{"id":44851,"date":"2024-04-15T21:49:39","date_gmt":"2024-04-15T21:49:39","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=44851"},"modified":"2024-04-15T21:49:39","modified_gmt":"2024-04-15T21:49:39","slug":"ieee-802-15-4-uses-which-of-the-following-for-accessing-the-channel","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/ieee-802-15-4-uses-which-of-the-following-for-accessing-the-channel\/","title":{"rendered":"IEEE 802.15.4 uses which of the following for accessing the channel?"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a979fb7dbd19\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Carrier sense multiple access (CSMA)                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Carrier sense multiple access with collision detection (CSMA-CD)                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    Carrier sense multiple access with collision avoidance (CSMA-CA)                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    None of these                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is C. Carrier sense multiple access with collision avoidance (CSMA-CA).<\/p>\n<p>Carrier sense multiple access (CSMA) is a method of medium access control (MAC) in which a node senses the presence of a carrier on the medium before attempting to transmit. If the medium is busy, the node waits until it is idle before transmitting.<\/p>\n<p>Carrier sense multiple access with collision detection (CSMA-CD) is a method of MAC in which a node senses the presence of a carrier on the medium before attempting to transmit. If the medium is busy, the node waits until it is idle before transmitting. If two nodes transmit at the same time, a collision occurs and both nodes will detect the collision and back off for a random amount of time before attempting to transmit again.<\/p>\n<p>Carrier sense multiple access with collision avoidance (CSMA-CA) is a method of MAC in which a node senses the presence of a carrier on the medium before attempting to transmit. If the medium is busy, the node waits until it is idle before transmitting. If the medium is idle, the node will transmit after a random amount of time. This is done to avoid collisions.<\/p>\n<p>IEEE 802.15.4 is a standard for low-power, short-range wireless personal area networks (WPANs). It is used in a variety of applications, including home automation, industrial automation, and medical devices. IEEE 802.15.4 uses CSMA-CA for accessing the channel.<\/p>\n<p>CSMA-CA is a more efficient method of MAC than CSMA-CD. This <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> is <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> because CSMA-CA avoids collisions by having nodes transmit after a random amount of time. This prevents two nodes from transmitting at the same time and causing a collision.<\/p>\n<p>CSMA-CA is also a more scalable method of MAC than CSMA-CD. This is because CSMA-CA can support more nodes on the network without causing collisions. This is because nodes transmit after a random amount of time, which spreads out the transmissions and prevents collisions.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[728],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>IEEE 802.15.4 uses which of the following for accessing the channel?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/ieee-802-15-4-uses-which-of-the-following-for-accessing-the-channel\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta 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