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Appendix A

Practice Exam

33.

A, B, D, E, F. Layer 3 switching provides everything except filtering
by Transport layer (layer 4) port addressing. See Chapter 1 for more
information.

34.

C. Wildcards are used to specify a range of subnets. 15 is a wildcard
used to filter a block size of 16. The IP address subnet starts at 16 and
uses a block size of 16, so the subnets filtered are 1631. See Chapter 11
for more information.

35.

B, C. Trunked links are used to send information about multiple
VLANs down one link. Access links carry information about only
one VLAN. Packets from one VLAN must go through a router to
communicate with another VLAN. For more information, see
Chapter 3.

36.

A, B, D. Proxy ARP is broadcast intensive and can cause a lot of
overhead on a router. The ARP cache on a host must time out before
it will broadcast an ARP looking for another MAC address of a
remote host. Also, you cannot control which router is running and
answering the ARPs. See Chapter 8 for more information on Proxy ARP.

37.

A, B. The command ip address address and ip default-
gateway address

are used to set the IP address information on a

1900 switch. See Chapter 2 for more information.

38.

B. When flows are very short, this timer causes the cache entry to be
flushed before the normal aging time. Partial entries are flushed by a
different mechanism. Aged entries are handled by the normal aging
timer. See Chapter 7 for more information.

39.

C, D. Extended IP access lists use source and destination IP
addresses, the protocol field in the Network layer header, and the port
number in the TCP header. See Chapter 11 for more information.

40.

D. Trunked links are used to send information about multiple
VLANs down one link. Access links carry information about only
one VLAN. For more information, see Chapter 3.

41.

C, D. The passwords must be at least four characters, and they are
not case sensitive. See Chapter 2 for more information.

42.

B. By doing the math you'll see that 225 less 128 equals 97, which is
61 converted to hex. See Chapter 9 for more information.

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