0 votes 0 votes IN standard Ethernet, if the maximum propagation time is 26.6 micro-second, what is the maximum size of the Ethernet frame? Computer Networks computer-networks ethernet numerical-answers + – tenjela asked Sep 24, 2022 retagged Sep 26, 2022 by Shubham Sharma 2 tenjela 732 views answer comment Share Follow See all 8 Comments See all 8 8 Comments reply Kabir5454 commented Sep 25, 2022 reply Follow Share A standard ethernet can transmit data at the rate up to $10$ Mbps . So, bandwidth (B)= $10$ Mbps maximum size of ethernet frame =$L$ Propagation time =$t_{p}=26.6$ $\mu s$ As we know in ethernet transmit time $t_{t}$ $\geq 2t_{p}$, So, $t_{t}$=$\frac{L}{B}$ So,$\frac{L}{B}\geq 2tp$ So,$L\geq 2*B*tp$ $L\geq 532$ bits So , minimum frame size should be $532$ bits or $66.5$ bytes. Maximum frame size as defined in IEEE $802.3$ can be $1500$ byte (excluding header) . 0 votes 0 votes Nisha Bharti commented Sep 25, 2022 i edited by Nisha Bharti Sep 25, 2022 reply Follow Share @Kabir5454 To avoid monopoly why we use 1500 byte of data in maximum frame size? 0 votes 0 votes Nisha Bharti commented Sep 25, 2022 reply Follow Share but listen in the given question they ask maximum size of frame not maximum amount of data in ethernet frame @Kabir5454 0 votes 0 votes Pranavpurkar commented Sep 25, 2022 reply Follow Share @Kabir5454But here it is not asked the minimum frame size to detect the collisions properly although L>= 532 bits is correct from proper collision detection in CSMA/CDbut nothing such is mentioned there so I think here the answer should be 1500B as it is the maximum size an ethernet frame can have. 0 votes 0 votes Kabir5454 commented Sep 25, 2022 reply Follow Share @Nisha Bharti if the size of the frame is 532 bits then it can be safely use in the ethernet system as it can safely detect the collision but it is not the maximum size of the frame as from IEEE 802.3 we know we can send maximum 1500 byte frame so answer would be 1500 byte frame we can send at maximum . I have shown the minimum frame size just to give a comparison . The data we send depend on the frame size so we don’t know how much data we send always in advance and it is not fix always so we should calculate frame size and i have calculated that . 0 votes 0 votes Kabir5454 commented Sep 25, 2022 reply Follow Share @Pranavpurkar yes answer should be 1500 byte . 0 votes 0 votes Pranavpurkar commented Sep 25, 2022 reply Follow Share yup :) 0 votes 0 votes Nisha Bharti commented Sep 25, 2022 reply Follow Share @Kabir5454 As you taken 10 Mbps bandwidth which are used in standard ethernet right? but in ethernet every thing is already fix means for standard ethernet distance will be 2500 m, speed will be 2 *10^8 m/s so standard propagataion delay(Tp) will be 12.5 micro second right? but here standard Tp is given in the question 26.6 micro second so what can we say Maximum or min are fix but between max & min Tp can be vary? 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Ans will be 1518 bytes.1500 bytes is maximum data. Nisha Bharti answered Sep 25, 2022 edited Sep 25, 2022 by Nisha Bharti Nisha Bharti comment Share Follow See all 0 reply Please log in or register to add a comment.