674 Chapter 9: Scenarios for Final Preparation
6
The enable password is the required password; the user is prompted after typing the
enable EXEC command. The enable and enable secret commands define the password;
if both are configured, the enable secret password is used.
7
The steps are as follows:
R3#configure terminal
R3(config)#interface serial 0
R3(config-if)#D?
dce-terminal-timing-enable default delay description dialer
dialer-group down-when-looped dspu dxi
R3(config-if)#d#Ctrl-Z
R3#
8
write memory and copy running-config startup-config are the two commands that
could be used.
9
The onscreen code is as follows:
R1#configure terminal
R1(config)#hostname R2
R2(config)Ctrl-Z
R2#
The most important part of this question is to realize that configuration changes are
immediate. Notice that the prompt is changed immediately after the hostname command.
10
Enter the mask information as the number of subnet bits rather than simply typing the
mask. In this network, mask 255.255.255.192 implies 6 host bits. A Class B network is
used, which implies 16 network bits, leaving 10 subnet bits.
11
The Time To Live field in the IP header is decremented by each router. After the number
is decremented to 0, the router discards the packet. That router also sends an ICMP TTL-
exceeded message to the host that originally sent the packet.
12
The router plays no role in TCP error recovery in this case. The endpoint hosts are
responsible for the TCP processing.
13
Integrated multiprotocol routing means that routed protocols IP, IPX, and AppleTalk use
a common routing protocol, which consolidates routing updates.
14
Inverse ARP is used by R1 to announce its IP and IPX addresses on the serial interface
used for Frame Relay. The Inverse ARP message is sent over the VC between the two
routers. R2 learns based on receiving the message.
15
NBMA stands for nonbroadcast multiaccess.
ch09.fm Page 674 Monday, March 20, 2000 5:23 PM