Chapter 14 681
Chapter 14
1
What are two frame types that SNA networks transport?
SDLC and LLC2.
2
What type of explorer packet takes every possible path through the network?
An all-routes explorer.
3
In SNA networks, should the convergence time be less than the session expiration time?
Yes. If a link goes down, the routers need to converge on a new path to the destination
before an SNA session will time out.
4
Does an explorer ever visit the same Token Ring twice?
No. Explorers should visit a Token Ring only one time.
5
What is Proxy Explorer used for?
It creates an explorer reply cache on the router.
6
What is a method of transporting SNA and NetBIOS frames over an IP network?
DLSw+.
7
What type of DLSw+ encapsulation can be used on Token Ring ports but not Ethernet?
Fast Sequenced Transport (FST).
8
Which type of encapsulation uses more CPU cycles to support it, Local Acknowledgment
or Direct?
Local Acknowledgment encapsulation provides for Local Acknowledgement, which
creates more work for the CPU.
9
Name three methods of controlling CANYOUREACH explorer frames in DLSw+
networks.
Filtering, statically, virtual ring numbering, caching, explorer firewalls.
10
How many times must a border peer replicate a broadcast if it is configured for nine peers
in its group and two other border peers?
11 broadcast replications must be done--two for the border peers and nine for the
members of the group that it is border peering for.
11
Which type of QoS provides guaranteed service end-to-end across a network?
Resource Reservation Protocol (RSVP).
12
Name one reason why ISPs do not like to implement RSVP.
It permanently ties up bandwidth, even when there is no traffic flow.
87200333.book Page 681 Wednesday, August 22, 2001 1:41 PM