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22. What is a connection-less protocol at the Internet layer?
A. ARP B. RARP
C. TCP D. UDP
E. IP
F. ICMP G. BootP
Answer: E
Internet Protocol is a connection-less protocol that resides at the Internet layer of the DOD stack and
addresses hosts.
Chapter: 1
23. What protocol sends redirects back to an originating router?
A. IP
B. ARP
C. BootP D. ICMP
E. TCP
Answer: D
ICMP redirects occur when a router determines the next hop is on the same network the packet originated
from. ICMP unreachable messages are returned when a service or host is not available.
Chapter: 1
24. When would a router receive an ICMP unreachable message?
A. When IP is not loaded on the transmitting device B. When a service or host is not available
C. When ARP broadcasts are not available
D. When BootP can't find a hardware address
Answer: B
ICMP redirects occur when a router determines the next hop is on the same network the packet originated
from. ICMP unreachable messages are returned when a service or host is not available.
Chapter: 1