Q&A: IP Address

Question 10:

the choices below, which address represents a unicast address.
A. 224.1.5.2
B. FFFF. FFFF. FFFF.
C. 192.168.24.59/30
D. 255.255.255.255
E. 172.31.128.255/18


Answer: E
Explanation:
172.31.128.255 is the only unicast address. It seems to be a broadcast address, because of
255 in the last octet, the broadcast address for this network is 172.31.131.255.
Incorrect Answers:
A: 224.1.5.2 is a multicast address.
B: This is a broadcast layer 2 (data link) address.
C: Using a /30 for the subnet mask, this IP address becomes the broadcast address.
D. This is a broadcast IP address.


QUESTION 11:

With regard to bridges and switches, which of the following statements are true.
(Choose three.)
A. Switches are primarily software based while bridges are hardware based.
B. Both bridges and switches forward Layer 2 broadcasts.
C. Bridges are frequently faster than switches.
D. Switches typically have a higher number of ports than bridges.
E. Bridges define broadcast domain while switches define collision domains.
F. Both bridges and switches make forwarding decisions based on Layer 2 addresses.


Answer: B, E, F
Explanation:
B, F: Both are layer 2 (data link) devices designed to forward layer 2 broadcasts and
multicast addresses.
E: All hosts within a bridged network comprise a single broadcast domain, while
switches can be used to segment LANs into separate collision domains. Switches are
VLAN-capable while bridges are typically not capable of this.