a. Distinguish between Step 1 and Step 2 in the routing process.

10a1.) The first step in the routing process involves _________.

a. Selecting the best match row

b. Comparing the packet's destination IP address to all rows

c. Comparing the packet's destination IP address to matching rows

d. Selecting an interface

10a2.) The second step in the routing process involves _________.

a. Selecting the best-match row

b. Comparing the packet's destination IP address to all rows

c. Comparing the packet's destination IP address to matching rows

d. Selecting an interface

10a3.) A(n) _________ must find the best-matching row in its _________ table by comparing multiple row matches.

a. Ethernet switch; switching

b. Router; routing

c. Both A and B

d. Neither A nor B

b. If any row other than the default row matches an IPv4 address, why will the router never choose the default row?

10b.) If any row other than the default row matches an IPv4 address, the router will _________.

a. Always choose the default row

b. Sometimes choose the default row

c. Never choose the default row

d. It cannot be determined from the information given.

c. Which rows in Figure 8-11 match 128.171.17.13? (Don’t forget the default row.) Show your calculations for rows that match.

d. Which of these is the best-match row? Justify your answer.

10d.) Row 2707 has the mask /16 and the cost metric 20. Row 4400 has the mask /14 and the cost metric 10. The default row has a metric cost of 2. Which row will the router choose if both are matches?

a. 2707

b. 4400

c. 2

d. It cannot be determined from the information given.

e. What rows match 172.40.17.6? Show your calculations for rows that match.

f. Which of these is the best-match row? Justify your answer.

g. Which rows match 172.30.12.47? Show your calculations for rows that match.

h. Which of these is the best-match row? Justify your answer.

i. How would your previous answer change if the metric had been reliability?

10i.) Row 2707 has the mask /16 and the reliability metric 20. Row 4400 has the mask /16 and the reliability metric 10. Which row will the router choose if both are matches?

a. 2707

b. 4400

c. Either A or B

d. The router will choose the default row.