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674 Appendix A: Answers to Review Questions
Chapter 11
1
Does IPX use the unnumbered feature?
No.
2
Is IP unnumbered a standard in the industry?
No. It is not a standard and will not work with other vendor routers.
3
Can you use IP unnumbered on a Frame Relay interface?
Yes. IP unnumbered assumes a point-to-point environment, so it will work if you use a
point-to-point subinterface at both ends.
4
Is a T1 full duplex or half duplex?
Full duplex.
5
What are the pinouts of a T1 interface used with an RJ-45 jack?
A T1 uses pins 1, 2, 4, and 5 with an RJ-45 jack.
6
Is it possible to bundle four ISDN BRI connections to one logical channel (bundle) using
multilink PPP?
Yes. For point-to-point connections, use the Cisco IOS feature ppp multilink, which is
described in RFC 1717 and is available starting in Cisco IOS 11.0(3).
7
What type of attack does CHAP provide protection against?
Playback attacks.
8
Does MLPPP affect routing tables?
No. MLPPP operates at Layer 2.
9
Name three dialer interfaces that MLPPP supports.
ISDN, asynchronous, synchronous.
10
What remote access protocol was used prior to PPP?
Serial Line IP (SLIP).
11
Which series of routers provides for cable modem access?
The 900 series.
12
What series of router can share modular cards with the 1600, 2600, and 3600 routers?
The 1700 series routers.
13
Which remote access server in the 5000 series supports a T3 connection?
The AS5800 series can support a T3 connection.
87200333.book Page 674 Wednesday, August 22, 2001 1:41 PM