Information Technology Reference
In-Depth Information
16.
A. IPv4 packets can be fragmented by the sending host and routers.
17.
B. Multicast addresses are received to a set of hosts subscribed to the multicast group.
18.
B. D, and E. The three types of IPv4 address are unicast, broadcast, and multicast.
19.
A, C, and D. End-user workstations, Cisco IP phones, and mobile devices should have
their IP addresses assigned dynamically.
20.
B. Dynamic name resolution reduces administrative overhead. Name-to-IP address
tables do not need to be configured.
21.
B. There are 4 bits to determine number of host addresses: 24-2 = 16 - 2=14.
22.
B. Answer B allows up to 6 hosts. Answer A allows only 2 hosts, which is too small.
Answer C allows 14 hosts, which is larger than answer b.
23.
B. The networks in answer B provide 126 addresses for hosts in each LAN at Site B.
24.
A. Network 192.168.15.0/25 provides 126 addresses for LAN 1, network
192.168.15.128/26 provides 62 addresses for LAN 2, and network 192.168.15.192/27
provides 30 addresses for LAN 3.
25.
D. You need only two addresses for the WAN link, and the /30 mask provides only
two.
26.
A. Private addresses are not announced to Internet service providers.
27.
B. NAT translates internal private addresses to public addresses.
28.
D. VLSM provides the ability to use different masks throughout the network.
Chapter 9
“Do I Know This Already?” Quiz
1.
C. IPv6 uses 128 bits for addresses, and IPv4 uses 32 bits. The difference is 96.
2.
C. The IPv6 header is 40 bytes in length.
3.
C. The defining first hexadecimal digits for link-local addresses are FE8.
4.
D. IPv6 addresses can be unicast, anycast, or multicast.
5.
B. Answers A and C are incorrect because you cannot use the double colons (::) twice.
Answers C and D are also incorrect because you cannot reduce b100 to b1.
6.
C. NAT-PT translates between IPv4 and IPv6 addresses.
7.
B. The IPv6 multicast address type handles broadcasts.
8.
B. The IPv6 loopback address is ::1.
9.
A. IPv4-compatible IPv6 addresses have the format ::d.d.d.d.
10.
records.
