652 Appendix A: Answers to Review Questions
10
Name four networking areas where ATM could be implemented.
Campus, local area, wide area, metropolitan.
11
What protocol controls the user cell stream between nodes and networks?
Private Network-Node Interface (intranetwork) or Private Network-Network Interface
(internetwork)(PNNI).
12
How many characters comprise an NSAP address?
20 octet or 40 hex.
13
What is Interim Local Management Interface (ILMI), and how is it used to connect end
stations?
ILMI allows two systems to exchange ATM information. LECs use ILMI to locate the
LECs and to determine their own address.
14
Name four Cisco products that can form the building blocks of an ATM WAN.
Cisco/StrataCom IGX switch, which is well-suited for deployment in an enterprise WAN
environment.
Cisco/StrataCom BPX/AXIS switch, which meets the needs of high-end enterprise WAN
and service provider environments.
Cisco AIP for the Cisco 7500 and 7000 series of routers.
Cisco ATM Network Interface Module (NIM) for the Cisco 4700 and 4500 series of
routers.
15
Name two business and technical requirements that might lead an engineer to select ATM
as a design solution.
Business requirement: Distance learning and training.
Business requirement: Video on demand.
Technical requirement: Single multiservice enterprise solution granting voice, data, and
video with Quality of Service.
Technical requirement: Greater bandwidth on demand to satisfy bandwidth-intensive
applications.
16
Why is congestion control a serious issue?
Congestion control is a serious issue because one cell loss means loss of the whole frame.
If a frame is lost, many cells must be retransmitted. Congestion control helps guarantee
the Quality of Service specified in the service contract.
17
What RFC allows multiple protocols to be multiplexed over a single PVC?
RFC 1483.
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