Problem 5 (14pt) (a) i. Does a wireless link use reliable delivery service? [Ipt

Question

Problem 5 (14pt) (a) i. Does a wireless link use reliable delivery service? [Ipt i. If two computers wan to have reliable delivery over Ethernet links,in which layer they should use a reliable communication protocol? [Ipt] (b) Five stations use TDMA to fairly share a channel. Suppose the channel bandwidth is 10Mbps. If only two stations transmit in the past second. Then how many data can they transmit at most in the past second, respectively? [2pt (c) What is the multiple access protocol of Ethernet, including the backoff mechanism? [2pt] (d) How does a router get is forwarding table? How does a switch get its forwarding table? [2pt) (e) In the following example 19-80-02-C7-56-2A 74-29-9C-E&-FF-55 222 222 222 220 A-23-F9-CD-05-9 8-82 2-54-1A F CC-43-0E-D0A8-70 7-88-16

Explanation / Answer

5.a.)i.)Ans-:Yes,a wireless link use a reliable delivery service because wireless link is more prone to error.

a.)ii.))Ans-: In data link layer they should use

c.)ans-:  Carrier-sense multiple access with collision detection (CSMA/CD) is a media access control method used in Ethernet technology for local area networking. It uses a carrier sensing to defer transmissions . The collision detection is also used in which a transmitting station detects collisions by sensing transmissions from other stations while it is transmitting a frame.when a collision condition is detected, the station stops transmitting that frame, transmits a jam signal, and then waits for a random time interval before trying to resend the frame.

d>Ans-:In static technique to route Routing entries are entered once and are not updated again. Static routes are often used to define the last resort next hop. If we don't know what to do with a packet, send it here. sTATIC ROUTING IS safe rather than other routing technique

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