Information Technology Reference
In-Depth Information
20.
A. The WAN/MAN module provides connectivity to the remote sites via Frame Relay,
TDM, ATM, or SONET network services.
21.
DOCSIS. The Data Over Cable Service Interface Specifications (DOCSIS) protocol
defines the cable procedures that the equipment need to support.
22.
C. ISDN falls into the circuit-switched WAN category.
23.
D. SLA defines what level of service, offered by the provider such as bandwidth,
allowed latency, and loss.
24.
B. WANs that occasionally become congested is a good candidate for queuing solutions.
Chapter 7
“Do I Know This Already?” Quiz
1.
A. Frame Relay and ATM are commonly used to connect to WAN services in the
enterprise edge.
2.
A, B, and C. Typical remote-access requirements include best-effort interactive traffic
patterns.
3.
C. Extranet VPN infrastructure uses private and public networks, which are used to
support business partner connectivity.
4.
D. DMVPN. In enterprise environments, DMVPN is used on routers with NHRP and
mGRE.
5.
B. Secondary WAN links offer both backup and load-sharing capabilities.
6.
C. The goal of high availability is to remove the single points of failure in the design,
either by software, hardware, or power. Redundancy is critical in providing high levels
of availability.
7.
C. SP MPLS MPLS/IP VPN has excellent growth support and high-availability services.
8.
B. Cisco IOS S Releases 12.2SB and 12.2SR are designed for the enterprise and SP
edge networks.
9.
A, B, and D. Common components used when designing enterprise branch architec-
tures include routers, switches, and IP phones.
10.
B. The medium branch design is recommended for branch offices of 50 to 100 users,
with an additional access router in the WAN edge allowing for redundancy services.
Q&A
1.
B. Leased lines are dedicated network connections provided by the service provider.
2.
A. A major disadvantage of the hub and spoke topology is that the hub router repre-
sents a single point of failure.
