?( Which of the following items are considered WAN devices? (Choose three
A. Bridge
B. Modem
C. Router
D. Ethernet switch
E. Access server
F. Repeater


? Which layer of the hierarchical network design model is often called the backbone
A. Access
B. Distribution
C. Network
D. Core
E. Workgroup
F. WAN


Match each term with its definition
Circuit switching
Packet switching
Connection-oriented packet switching
Connectionless packet switching
A. A switching technology in which each switch must evaluate the packet’s address to
determine where to send it
B. A switching technology in which a virtual circuit exists only while a packet travels
through it
C. A switching technology that establishes routes through the switches for particular
end-to-end connections
D. A switching technology that has a preestablished dedicated circuit (or channel

between nodes and terminals


Match each term with its packet-switched technology definition
Metro Ethernet
X.25
ATM
Frame Relay
A. Provides a high-bandwidth Layer 2 network that can manage data, voice, and video
all on the same infrastructure
B. Built on a cell-based architecture in which the cell has a fixed length of 53 bytes
C. Operates at the data link layer, and the PVC is identified by a Data Link Control
Identifier
D. Operates at the network layer, and the SVC is identified by a channel number


? Which device is commonly used as Data Terminal Equipment
A. ISDN
B. Modem
C. Router
D. CSU/DSU


Which type of WAN connection should you choose when a dedicated point-to-point
WAN communications path from the customer premises through the provider network
to a remote destination is required
A. ISDN
B. Analog dialup
C. ATM
D. Frame Relay
E. Leased line


? How are Frame Relay virtual circuits identified
A. CIR
B. DLCI
C. VPI
D. MAC
E. SPID

What WAN technology is designed to deliver data, voice, and video simultaneously
built on a cell-based architecture
A. ATM
B. Cable
C. Frame Relay
D. ISDN


Which architecture enables enterprises to offer important network services—such as
security, new communication services, and improved application performance—to
every office, regardless of its size or proximity to headquarters
A. Cisco Enterprise Campus Architecture
B. Cisco Enterprise Data Center Architecture
C. Cisco Enterprise Branch Architecture
D. Cisco Enterprise Teleworker Architecture


At which layer of the hierarchical network model do users connect to the network
A. Application
B. Access
C. Distribution
D. Network
E. Core


ISDN PRI is composed of how many B channels in North America
A. 2
B. 16
C. 23
D. 30
E. 64

The ability to connect securely to a private network over a public network is provided
by which WAN technology
A. DSL
B. Frame Relay
C. ISDN
D. PSTN
E. VPN


Which hierarchical network model layer is responsible for containing network problems
to the workgroups in which they occur
A. Application
B. Access
C. Distribution
D. Network
E. Core


What term describes the cabling that connects the customer site to the nearest exchange
of the WAN service provider
A. CPE
B. CO
C. Local loop
D. DCE
E. DTE


Which goal can be accomplished by implementing the Cisco Enterprise Teleworker
Architecture
A. It allows the enterprise to add large branch sites that span geographic areas
B. It allows the enterprise to deliver secure voice and data services to workers no matter
where or when they work
C. To reduce remote security threats, it forces users who are located at main sites to log
on to resources
D. It satisfies telephony requirements for users who are located at medium to large
enterprise sites