606 Chapter 8: WAN Protocols and Design
13
When creating a partial-mesh Frame Relay network, are you required to use
subinterfaces?
14
What benefit related to routing protocols can be gained by using subinterfaces with a
partial mesh?
15
Can PPP perform dynamic assignment of IP addresses? If so, is the feature always
enabled?
16
Create a configuration to enable PPP on serial 0 for IP and IPX. Make up IP and IPX Layer
3 addresses as needed.
17
Create a configuration for Router1 that has Frame Relay VCs to Router2 and Router3
(DLCIs 202 and 203, respectively) for Frame Relay on Router1's serial 1 interface. Use
any IP and IPX addresses you like. Assume that the network is not fully meshed.
18
What show command will tell you the time that a PVC became active? How does the
router know what time the PVC became active?
19
What show commands list Frame Relay information about mapping? In what instances
will the information displayed include the Layer 3 addresses of other routers?
20
True or false: The no keepalive command on a Frame Relay serial interface causes no
further Cisco proprietary keepalive messages to be sent to the Frame Relay switch.
21
What debug options will show Inverse ARP messages?
22
True or false: The Frame Relay map configuration command allows more than one Layer
3 protocol address mapping on the same configuration command.
23
What do the letters in ISDN represent? What about BRI and PRI?
24
Define the term function group. List two examples of function groups.
25
Define the term reference point. List two examples of reference points.
26
How many bearer channels are in a BRI? What about a PRI in North America? What about
a PRI in Europe?
27
True or false: ISDN defines protocols that can be functionally equivalent to OSI Layers 1,
2, and 3. Defend your answer.
28
What reference points are used by ISDN BRI interfaces on Cisco routers?
29
What do the letters LAPD represent? Is LAPD used on ISDN channels? If so, which ones?
30
Name the standards body that defines ISDN protocols.
31
What ISDN functions do standards ITU-T Q.920 and Q.930 define? Does either standard
correlate to an OSI layer?
32
What ISDN functions does standard ITU-T I.430 define? Does it correlate to an OSI
layer?
ch08.fm Page 606 Monday, March 20, 2000 5:17 PM