Thought Questions 1-1. In Figure 1-28, when Host A transmits 1-2. Repeat for Hos

Question

Thought Questions 1-1. In Figure 1-28, when Host A transmits 1-2. Repeat for Host Csending a packet to a packet to Host B, how many physical links, data links, and routes will there be along the way? How many packets and frames? How many switches and routers? Hint: figure, but work it out younselt.) 1-3. Repeat for Host A to Host c 14. Repeat for Host E and Router 3 1-5. Repeat for Router 1 and Router 3 The answers are in the 1-6. Repeat for Router 1 and Router 2 Switched Network X Switch 3 Host C Host A Physical Link Stch X4 Network Y Router R1 Switch X2 Route A-B Switched Network 2 Hoat B Z1 Router R2 Frame Z Switch Data Unk R2-0 Router A3 Switch 24 Host D Host E FIGURE 1-28 An Exercse in Physical, Links, Data Links, and Routes Chapter 1 Thought questions work sheet Physical Data routes frames packets switches routers links links 1-1 1-2 1-3 1-4

Explanation / Answer

Let's see how to check these values.

1-2 from Host c to host E: Physical link: First physical link is between Host c to switch X4. then X4 to X3. X3 to X1. X1 to X2. X2 to Router R1. R1 to R2, R2 to z1. z1 to Z3 Z3 to Z4. Z4 to host E.

Data Link: Host C to R1. R1 to R2. R2 to Host E.

Routes: Route host C to E

Frames: Frame x, Frame Y and Frame Z.

Packets: As the packet doesnt change while moving from one network to another so there will be just 1 packet which will move from C to E.

Switches: There are 7 switches in between Host C and E namely X4,X3,X1,X2,Z1,Z3,Z4.

Routers: In between there are 2 routers R1 and R2.

1-4 From Host E to router 3:

there are 2 phycial links E to Z4. Z4 to R3.

There is just 1 Data Link Host E to R3.

Routes are 0 as they both are on the same network.

There is 1 packet.

There is 1 switch in between i.e Z4.

there are no routers in between the 2. As the question has mentioned we have to count only those who are in between sender and receiver.

1-5 R1 To R3:

There are 5 physical links Startng with R1 to R2 and ends with Z4 to R3.

There are 2 Data Links R1 to R2 and R2 to R3.

there is 1 route between R1 and R3.

There are 2 frames X and Y,

There is 1 packet.

three switches in between Z1,Z3 and Z4.

There is 1 router between R1 and R3 i.e R2

Physical Link Data Link Routes Frames packets switches routers 1-1 7 3 1 3 1 4 2 1-2 10 3 1 3 1 7 2 1-3 4 1 0 1 1 3 0 1-4 2 1 0 1 1 1 0 1-5 5 2 1 2 1 3 1 1-6 1 1 0 1 1 0 0

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