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Analysis Questions

1488 words - 6 pages

Chapter 5
Answer the following review questions.
1. Which of the following are functions of OSI Layer 3 protocols?
a. Logical addressing
b. Physical addressing
c. Path selection
d. Arbitration
e. Error recovery

2. Imagine that PC1 needs to send some data to PC2, and PC1 and PC2 are separated by several routers. What are the largest entities that make it from PC1 to PC2?
f. Frame
g. Segment
h. Packet
i. L5 PDU
j. L3 PDU
k. L1 PDU

3. Imagine a network with two routers that are connected with a point-to-point HDLC serial link. Each router has an Ethernet, with PC1 sharing the Ethernet with Router1, and ...view middle of the document...

PC1’s IP address is, and no subnetting is used. Which of the following addresses could be used for PC2?

7. Each Class B network contains how many IP addresses that can be assigned to hosts?
. 16.777,214
. 16,777,216
. 65,536
. 65,534
. 65,532
. 32,768
. 32,766

8. Each class C network contains how many IP addresses that can be assigned to hosts?
. 65,534
. 65,532
. 32,768
. 32,766
. 256
. 254

9. Which of the following does a router normally use when making a decision about routing TCP/IP packets?
. Destination MAC address
. Source MAC address
. Destination IP address
. Source IP address
. Destination MAC and IP address

10. Which of the following are true about a LAN-connected TCP/IP host and its IP routing (forwarding) choices?
. The host always sends packets to its default gateway.
. The host sends packets to its default gateway if the destination IP address is in a different class of IP network than the host.
. The host sends packets to its default gateway if the destination IP address is in different subnet than the host.
. The host sends packets to its default gateway if the destination IP address is in the same subnet as the host.

11. Which of the following are functions of a routing protocol?
. Advertising known routes to neighboring routers.
. Learning routes for subnets directly connected to the router.
. Learning routes, and putting those routes into the routing table, for routes advertised to the router by its neighboring routers.
. To forward IP packets based on a packet’s destination IP address.

12. Which of the following protocols allows a client PC to discover the IP address of another computer based on that other computer’s name?

13. Which of the following protocols allows a client PC to request assignment of an IP address as well as learn its default gateway?

Chapter 6
Answer the following review questions.
1. PC1 is using TCP and has a window size of 4000. PC1 sends four segments to PC2 with 1000 bytes of data each, with sequence numbers 2000, 3000, 4000, and 5000. PC1 does not receive an acknowledgment within its current timeout value for this connection. What should PC1 do next?
a. Increase its window to 5000 or more segments
b. Send the next segment, with sequence number 6000
c. Resend the segment whose sequence number was 5000
d. Resend all four previously sent segments

2. Which of the following are not features of a protocol that is considered to match OSI Layer 4?
e. Error recovery
f. Flow control
g. Segmenting of...

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