Chapter 10 671
27
What technology was designed for use in nonreliable physical layers?
X.25.
28
What is a low-cost method of connecting two sites?
A point-to-point link.
29
Load sharing is on by default with which three routing protocols?
IGRP, EIGRP, OSPF.
30
RIP is a ______ routing protocol.
Distance vector.
31
_______ occurs when fast-switched packets are sent from a high-speed interface to a low-
speed interface.
Congestion.
Chapter 10
1
X.25 uses what protocol at Layer 2?
LAPB.
2
X.25 uses what protocol at Layer 3?
X.25 PLP (Packet-Level Protocol).
3
At which layer do packet size and window size operate?
At the X.25 layer or Layer 3.
4
What does AO/DI stand for?
Always On Dynamic ISDN.
5
When the command encapsulate frame relay is applied to a serial interface, does that
make the serial interface point-to-point or multipoint by default?
Multipoint.
6
What range of DLCIs can be used on a serial interface encapsulated with Frame Relay?
161007. The range defined is 01023, but 015 and 10081023 are reserved.
7
Do most carriers charge for the local loop with dedicated lines? How about with Frame
Relay?
Most carriers charge extra for distance with dedicated lines, but with Frame Relay they
do not.
87200333.book Page 671 Wednesday, August 22, 2001 1:41 PM