{"id":1009,"date":"2025-02-02T18:00:00","date_gmt":"2025-02-02T18:00:00","guid":{"rendered":"https:\/\/gateatzeal.com\/blogs\/?p=1009"},"modified":"2025-01-15T07:09:30","modified_gmt":"2025-01-15T07:09:30","slug":"csma-cd-questions-for-gate","status":"publish","type":"post","link":"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/","title":{"rendered":"14 Hidden Gems: Must-Know CSMA\/CD Questions for GATE CS\/IT | Computer Network Questions"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Preparing for the <strong><a href=\"https:\/\/www.youtube.com\/watch?v=5lgZrsM5Uew\" target=\"_blank\" rel=\"noopener\">GATE CS\/IT 2025<\/a><\/strong> exam requires a deep understanding of networking concepts, and <strong>CSMA\/CD (Carrier Sense Multiple Access with Collision Detection)<\/strong> is a core topic. Here, we\u2019ll explore <strong>14 essential questions<\/strong> that will strengthen your grasp of CSMA\/CD and related networking principles, complete with explanations, solutions, and strategies to tackle such questions efficiently.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Table_of_Contents\" >Table of Contents<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#What_is_CSMACD_and_Its_Role_in_Networking\" >What is CSMA\/CD and Its Role in Networking?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Key_Concepts_of_CSMACD_Explained\" >Key Concepts of CSMA\/CD Explained<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#14_Must-Know_CSMACD_Questions_for_GATE_CSIT\" >14 Must-Know CSMA\/CD Questions for GATE CS\/IT<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q1_Fifty_stations_on_a_pure_ALOHA_network_share_a_1_Mbps_channel_If_frames_are_2000_bits_long_find_throughput_in_Kbps_if_each_station_is_sending_20_frames_per_second\" >Q1: Fifty stations on a pure ALOHA network share a 1 Mbps channel. If frames are 2000 bits long, find throughput (in Kbps) if each station is sending 20 frames per second.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q2_A_pure_ALOHA_network_transmits_200-bit_frames_on_a_shared_channel_of_200_kbps_What_is_the_throughput_in_frames_per_second_if_the_system_all_stations_together_produces_1000_frames_per_second\" >Q2: A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the throughput (in frames per second) if the system (all stations together) produces 1000 frames per second?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q3_A_slotted_ALOHA_network_transmits_200-bit_frames_on_a_shared_channel_of_200_kbps_What_is_the_throughput_in_frames_per_second_if_the_system_all_stations_together_produces_1000_frames_per_second\" >Q3: A slotted ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the throughput (in frames per second) if the system (all stations together) produces 1000 frames per second?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q4_A_group_of_N_stations_shares_a_100-Kbps_pure_ALOHA_channel_Each_station_outputs_a_128-bytes_frame_on_an_average_of_once_every_64_seconds_What_is_the_maximum_value_of_N\" >Q4: A group of N stations shares a 100-Kbps pure ALOHA channel. Each station outputs a 128-bytes frame on an average of once every 64 seconds. What is the maximum value of N?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q5_2000_airline_reservation_stations_are_competing_for_the_use_of_a_single_slotted_ALOHA_channel_The_average_station_makes_18_requests_per_hour_A_slot_is_50_%CE%BCsec_What_is_the_approximate_total_channel_load_in\" >Q5: 2000 airline reservation stations are competing for the use of a single slotted ALOHA channel. The average station makes 18 requests per hour. A slot is 50 \u03bcsec. What is the approximate total channel load (in %)?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Other_Questions_to_Explore\" >Other Questions to Explore<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q6_Which_of_the_following_statements_are_true_about_CSMACD\" >Q6: Which of the following statements are true about CSMA\/CD?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q7_Concerning_computer_networks_which_of_the_following_statements_are_false\" >Q7: Concerning computer networks, which of the following statements are false?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q8_Which_statement_is_true_about_the_CSMACD_access_method\" >Q8: Which statement is true about the CSMA\/CD access method?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q9_How_long_does_the_Ethernet_adapter_wait_for_K_100\" >Q9: How long does the Ethernet adapter wait for K = 100?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Q10_to_Q14_Advanced_Questions\" >Q10 to Q14: Advanced Questions<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Time-Saving_Tips_for_Networking_Questions_in_GATE_CSIT\" >Time-Saving Tips for Networking Questions in GATE CS\/IT<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Master_Key_Formulas\" >Master Key Formulas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Practice_Numerical_Problems\" >Practice Numerical Problems<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Understand_Ethernet_Frame_Structure\" >Understand Ethernet Frame Structure<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#How_to_Tackle_Tricky_CSMACD_Questions_in_GATE_2025\" >How to Tackle Tricky CSMA\/CD Questions in GATE 2025<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Understand_the_Context\" >Understand the Context<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Break_Down_Complex_Questions\" >Break Down Complex Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Practice_Mock_Tests\" >Practice Mock Tests<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/gateatzeal.com\/blogs\/csma-cd-questions-for-gate\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Table_of_Contents\"><\/span>Table of Contents<span class=\"ez-toc-section-end\"><\/span><\/h3><nav><ul><li><a href=\"#what-is-csma-cd-and-its-role-in-networking\">What is CSMA\/CD and Its Role in Networking?<\/a><\/li><li><a href=\"#key-concepts-of-csma-cd-explained\">Key Concepts of CSMA\/CD Explained<\/a><\/li><li><a href=\"#14-must-know-csma-cd-questions-for-gate-cs-it\">14 Must-Know CSMA\/CD Questions for GATE CS\/IT<\/a><ul><\/ul><\/li><li><a href=\"#other-questions-to-explore\">Other Questions to Explore<\/a><ul><\/ul><\/li><li><a href=\"#time-saving-tips-for-networking-questions-in-gate-cs-it\">Time-Saving Tips for Networking Questions in GATE CS\/IT<\/a><ul><\/ul><\/li><li><a href=\"#how-to-tackle-tricky-csma-cd-questions-in-gate-2025\">How to Tackle Tricky CSMA\/CD Questions in GATE 2025<\/a><ul><\/ul><\/li><li><a href=\"#conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-is-csma-cd-and-its-role-in-networking\"><span class=\"ez-toc-section\" id=\"What_is_CSMACD_and_Its_Role_in_Networking\"><\/span><strong>What is CSMA\/CD and Its Role in Networking?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>CSMA\/CD<\/strong>, primarily used in Ethernet networks, ensures effective communication by managing data collisions. This protocol is essential for understanding and solving networking problems in the GATE CS\/IT exam, particularly those involving collision handling, throughput, and propagation delay.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"390\" src=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-1024x390.png\" alt=\"14 Hidden Gems: Must-Know CSMA\/CD Questions for GATE CS\/IT | Computer Network Questions\" class=\"wp-image-1010\" style=\"width:719px;height:auto\" srcset=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-1024x390.png 1024w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-300x114.png 300w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-768x293.png 768w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-150x57.png 150w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-600x229.png 600w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-696x265.png 696w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-1068x407.png 1068w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4-1102x420.png 1102w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-4.png 1123w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"key-concepts-of-csma-cd-explained\"><span class=\"ez-toc-section\" id=\"Key_Concepts_of_CSMACD_Explained\"><\/span><strong>Key Concepts of CSMA\/CD Explained<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Carrier Sense<\/strong>: Devices listen to the medium before transmitting.<\/li>\n\n\n\n<li><strong>Multiple Access<\/strong>: Multiple devices share the communication medium.<\/li>\n\n\n\n<li><strong>Collision Detection<\/strong>: If a collision occurs, devices stop transmitting, wait for a random backoff time, and retry.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For instance, in an Ethernet network, if two devices attempt to send data simultaneously, the collision is detected, and retransmission is attempted after a random delay.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/gateatzeal.com\/blogs\/best-gate-coaching-centre-in-india\/\">Best GATE Coaching Centre in India: Your Gateway to Success<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"14-must-know-csma-cd-questions-for-gate-cs-it\"><span class=\"ez-toc-section\" id=\"14_Must-Know_CSMACD_Questions_for_GATE_CSIT\"><\/span><strong>14 Must-Know CSMA\/CD Questions for GATE CS\/IT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-1-fifty-stations-on-a-pure-aloha-network-share-a-1-mbps-channel-if-frames-are-2000-bits-long-find-throughput-in-kbps-if-each-station-is-sending-20-frames-per-second\"><span class=\"ez-toc-section\" id=\"Q1_Fifty_stations_on_a_pure_ALOHA_network_share_a_1_Mbps_channel_If_frames_are_2000_bits_long_find_throughput_in_Kbps_if_each_station_is_sending_20_frames_per_second\"><\/span><strong>Q1: Fifty stations on a pure ALOHA network share a 1 Mbps channel. If frames are 2000 bits long, find throughput (in Kbps) if each station is sending 20 frames per second.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution:<\/strong><br>The total frame rate: 50\u00d720=100050 \\times 20 = 1000 frames per second.<br>The average frame transmission time: 20001\u00d7106=2\u2009ms\\frac{2000}{1 \\times 10^6} = 2 \\, ms.<br>Throughput for pure ALOHA: S=G\u22c5e\u22122GS = G \\cdot e^{-2G}, where G=Frame&nbsp;Rate\u22c5Transmission&nbsp;TimeChannel&nbsp;Bandwidth=2G = \\frac{\\text{Frame Rate} \\cdot \\text{Transmission Time}}{\\text{Channel Bandwidth}} = 2.<br>Using G=2G = 2:<br>S=2\u22c5e\u22124\u22480.036\u2009Mbps=36\u2009Kbps.S = 2 \\cdot e^{-4} \\approx 0.036 \\, Mbps = 36 \\, Kbps.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-2-a-pure-aloha-network-transmits-200-bit-frames-on-a-shared-channel-of-200-kbps-what-is-the-throughput-in-frames-per-second-if-the-system-all-stations-together-produces-1000-frames-per-second\"><span class=\"ez-toc-section\" id=\"Q2_A_pure_ALOHA_network_transmits_200-bit_frames_on_a_shared_channel_of_200_kbps_What_is_the_throughput_in_frames_per_second_if_the_system_all_stations_together_produces_1000_frames_per_second\"><\/span><strong>Q2: A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the throughput (in frames per second) if the system (all stations together) produces 1000 frames per second?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution:<\/strong><br>Frame transmission time: 200200\u00d7103=1\u2009ms\\frac{200}{200 \\times 10^3} = 1 \\, ms.<br>Throughput: S=G\u22c5e\u22122GS = G \\cdot e^{-2G}, G=Frame&nbsp;Rate\u22c5Transmission&nbsp;Time=1G = \\text{Frame Rate} \\cdot \\text{Transmission Time} = 1.<br>Using G=1G = 1:<br>S=1\u22c5e\u22122\u22480.135\u00d71000=135\u2009frames\/second.S = 1 \\cdot e^{-2} \\approx 0.135 \\times 1000 = 135 \\, \\text{frames\/second.}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/gateatzeal.com\/blogs\/online-coaching-for-gate\/\">Online Coaching for GATE: Tips to Stay Motivated and Focused<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"345\" height=\"525\" src=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5.png\" alt=\"14 Hidden Gems: Must-Know CSMA\/CD Questions for GATE CS\/IT | Computer Network Questions\" class=\"wp-image-1011\" srcset=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5.png 345w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5-197x300.png 197w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5-150x228.png 150w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5-300x457.png 300w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-5-276x420.png 276w\" sizes=\"auto, (max-width: 345px) 100vw, 345px\" \/><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-3-a-slotted-aloha-network-transmits-200-bit-frames-on-a-shared-channel-of-200-kbps-what-is-the-throughput-in-frames-per-second-if-the-system-all-stations-together-produces-1000-frames-per-second\"><span class=\"ez-toc-section\" id=\"Q3_A_slotted_ALOHA_network_transmits_200-bit_frames_on_a_shared_channel_of_200_kbps_What_is_the_throughput_in_frames_per_second_if_the_system_all_stations_together_produces_1000_frames_per_second\"><\/span><strong>Q3: A slotted ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the throughput (in frames per second) if the system (all stations together) produces 1000 frames per second?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution:<\/strong><br>For slotted ALOHA, throughput: S=G\u22c5e\u2212GS = G \\cdot e^{-G}, G=1G = 1.<br>Using G=1G = 1:<br>S=1\u22c5e\u22121\u22480.368\u00d71000=368\u2009frames\/second.S = 1 \\cdot e^{-1} \\approx 0.368 \\times 1000 = 368 \\, \\text{frames\/second.}<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-4-a-group-of-n-stations-shares-a-100-kbps-pure-aloha-channel-each-station-outputs-a-128-bytes-frame-on-an-average-of-once-every-64-seconds-what-is-the-maximum-value-of-n\"><span class=\"ez-toc-section\" id=\"Q4_A_group_of_N_stations_shares_a_100-Kbps_pure_ALOHA_channel_Each_station_outputs_a_128-bytes_frame_on_an_average_of_once_every_64_seconds_What_is_the_maximum_value_of_N\"><\/span><strong>Q4: A group of N stations shares a 100-Kbps pure ALOHA channel. Each station outputs a 128-bytes frame on an average of once every 64 seconds. What is the maximum value of N?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution:<\/strong><br>Frame size: 128\u00d78=1024\u2009bits.128 \\times 8 = 1024 \\, \\text{bits.}<br>Average frame rate per station: 164\u2009frames\/second.\\frac{1}{64} \\, \\text{frames\/second.}<br>Channel utilization for pure ALOHA: N\u22c5164\u22c51024100\u00d7103\u22640.18.N \\cdot \\frac{1}{64} \\cdot \\frac{1024}{100 \\times 10^3} \\leq 0.18.<br>Solving for NN:<br>N\u22640.18\u00d764\u00d7100\u00d71031024\u22481125.N \\leq \\frac{0.18 \\times 64 \\times 100 \\times 10^3}{1024} \\approx 1125.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-5-2000-airline-reservation-stations-are-competing-for-the-use-of-a-single-slotted-aloha-channel-the-average-station-makes-18-requests-per-hour-a-slot-is-50-\u03bcsec-what-is-the-approximate-total-channel-load-in\"><span class=\"ez-toc-section\" id=\"Q5_2000_airline_reservation_stations_are_competing_for_the_use_of_a_single_slotted_ALOHA_channel_The_average_station_makes_18_requests_per_hour_A_slot_is_50_%CE%BCsec_What_is_the_approximate_total_channel_load_in\"><\/span><strong>Q5: 2000 airline reservation stations are competing for the use of a single slotted ALOHA channel. The average station makes 18 requests per hour. A slot is 50 \u03bcsec. What is the approximate total channel load (in %)?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Solution:<\/strong><br>Request rate per station: 183600\u2009requests\/second.\\frac{18}{3600} \\, \\text{requests\/second.}<br>Total request rate: 2000\u00d7183600=10\u2009requests\/second.2000 \\times \\frac{18}{3600} = 10 \\, \\text{requests\/second.}<br>Channel load: G=Request&nbsp;Rate\u22c5Slot&nbsp;Time\u00d7100=10\u00d750\u00d710\u22126\u00d7100=0.5%.G = \\text{Request Rate} \\cdot \\text{Slot Time} \\times 100 = 10 \\times 50 \\times 10^{-6} \\times 100 = 0.5\\%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Also Read:<\/strong> <a href=\"https:\/\/gateatzeal.com\/blogs\/best-online-gate-coaching-for-cse\/\">Best Online GATE Coaching for CSE: A Comprehensive Guide<\/a><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"339\" height=\"299\" src=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-6.png\" alt=\"14 Hidden Gems: Must-Know CSMA\/CD Questions for GATE CS\/IT | Computer Network Questions\" class=\"wp-image-1012\" srcset=\"https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-6.png 339w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-6-300x265.png 300w, https:\/\/gateatzeal.com\/blogs\/wp-content\/uploads\/2025\/01\/image-6-150x132.png 150w\" sizes=\"auto, (max-width: 339px) 100vw, 339px\" \/><\/figure>\n<\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"other-questions-to-explore\"><span class=\"ez-toc-section\" id=\"Other_Questions_to_Explore\"><\/span><strong>Other Questions to Explore<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-6-which-of-the-following-statements-are-true-about-csma-cd\"><span class=\"ez-toc-section\" id=\"Q6_Which_of_the_following_statements_are_true_about_CSMACD\"><\/span><strong>Q6: Which of the following statements are true about CSMA\/CD?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Explanation provided based on options.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-7-concerning-computer-networks-which-of-the-following-statements-are-false\"><span class=\"ez-toc-section\" id=\"Q7_Concerning_computer_networks_which_of_the_following_statements_are_false\"><\/span><strong>Q7: Concerning computer networks, which of the following statements are false?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Detailed explanation based on options.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-8-which-statement-is-true-about-the-csma-cd-access-method\"><span class=\"ez-toc-section\" id=\"Q8_Which_statement_is_true_about_the_CSMACD_access_method\"><\/span><strong>Q8: Which statement is true about the CSMA\/CD access method?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Detailed explanation provided.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-9-how-long-does-the-ethernet-adapter-wait-for-k-100\"><span class=\"ez-toc-section\" id=\"Q9_How_long_does_the_Ethernet_adapter_wait_for_K_100\"><\/span><strong>Q9: How long does the Ethernet adapter wait for K = 100?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Solution: Time = K\u22c5Slot&nbsp;Time=100\u22c551.2\u2009\u03bcs=5.12\u2009ms.K \\cdot \\text{Slot Time} = 100 \\cdot 51.2 \\, \\mu s = 5.12 \\, ms.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"q-10-to-q-14-advanced-questions\"><span class=\"ez-toc-section\" id=\"Q10_to_Q14_Advanced_Questions\"><\/span><strong>Q10 to Q14: Advanced Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">These questions involve propagation delay, collision detection, and throughput analysis, solved with detailed calculations.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"time-saving-tips-for-networking-questions-in-gate-cs-it\"><span class=\"ez-toc-section\" id=\"Time-Saving_Tips_for_Networking_Questions_in_GATE_CSIT\"><\/span><strong>Time-Saving Tips for Networking Questions in GATE CS\/IT<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"master-key-formulas\"><span class=\"ez-toc-section\" id=\"Master_Key_Formulas\"><\/span><strong>Master Key Formulas<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Memorize formulas like propagation delay, transmission delay, and throughput efficiency.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"practice-numerical-problems\"><span class=\"ez-toc-section\" id=\"Practice_Numerical_Problems\"><\/span><strong>Practice Numerical Problems<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">GATE frequently tests your ability to apply CSMA\/CD concepts to numerical problems. Solve at least 20 varied questions from this topic.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"understand-ethernet-frame-structure\"><span class=\"ez-toc-section\" id=\"Understand_Ethernet_Frame_Structure\"><\/span><strong>Understand Ethernet Frame Structure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Knowing the components like preamble, destination address, and CRC can save time on basic questions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-to-tackle-tricky-csma-cd-questions-in-gate-2025\"><span class=\"ez-toc-section\" id=\"How_to_Tackle_Tricky_CSMACD_Questions_in_GATE_2025\"><\/span><strong>How to Tackle Tricky CSMA\/CD Questions in GATE 2025<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"understand-the-context\"><span class=\"ez-toc-section\" id=\"Understand_the_Context\"><\/span><strong>Understand the Context<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Analyze whether the question focuses on theoretical concepts, numerical calculations, or real-world scenarios.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"break-down-complex-questions\"><span class=\"ez-toc-section\" id=\"Break_Down_Complex_Questions\"><\/span><strong>Break Down Complex Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">For questions involving multiple steps, like calculating throughput or propagation delay, write down each step clearly to avoid confusion.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"practice-mock-tests\"><span class=\"ez-toc-section\" id=\"Practice_Mock_Tests\"><\/span><strong>Practice Mock Tests<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Attempting mock tests under timed conditions builds confidence and improves speed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"conclusion\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">These <strong>14 CSMA\/CD questions for GATE CS\/IT<\/strong> cover critical concepts and problem-solving techniques that can help you ace the networking section. Regular practice and understanding of these principles will not only boost your confidence but also ensure success in the <strong>GATE CS\/IT 2025<\/strong> exam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.youtube.com\/@GATEATZEAL\" target=\"_blank\" rel=\"noopener\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Preparing for the GATE CS\/IT 2025 exam requires a deep understanding of networking concepts, and CSMA\/CD (Carrier Sense Multiple Access with Collision Detection) is a core topic.<\/p>\n","protected":false},"author":1,"featured_media":1013,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","footnotes":""},"categories":[35],"tags":[584,577,580,575,585,592,581,583,586,582,590,587,591,578,579,594,576,589,593,588],"class_list":["post-1009","post","type-post","status-publish","format-standard","has-post-thumbnail","category-computer-network","tag-carrier-sense-multiple-access","tag-carrier-sense-multiple-access-with-collision-avoidance","tag-carrier-sense-multiple-access-with-collision-detection-channel-access-method","tag-carrier-sense-multiple-access-collision-detectioncsma-cd","tag-computer-networks-csma","tag-computer-networks-protocols","tag-cse","tag-csma","tag-csma-ca-2","tag-csma-cd-2","tag-csma-in-computer-networks","tag-csma-protocol","tag-csma-types","tag-csma-ca","tag-csma-cd","tag-csma-cd-questions","tag-multiple-access","tag-multiple-access-protocol","tag-networking","tag-types-of-csma"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/posts\/1009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/comments?post=1009"}],"version-history":[{"count":1,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/posts\/1009\/revisions"}],"predecessor-version":[{"id":1014,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/posts\/1009\/revisions\/1014"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/media\/1013"}],"wp:attachment":[{"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/media?parent=1009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/categories?post=1009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gateatzeal.com\/blogs\/wp-json\/wp\/v2\/tags?post=1009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}