Module 7: WAN Concepts (ENSA v7.0) - Multiple Choice Questions

What does WAN stand for?

• Wide Area Network

• Wireless Access Network

• Web Application Network

• Wired Access Node

Which organization defines global standards for fiber-optic data transmission known as SDH?

• IEEE

• ISO

• ITU

• TIA/EIA

Which topology connects all sites directly to each other?

• Point-to-point

• Hub-and-spoke

• Fully meshed

• Dual-homed

Which of the following is an example of a packet-switched WAN technology?

• PSTN

• ISDN

• Frame Relay

• T1 line

How does a public WAN differ from a private WAN?

• It is owned by a single customer

• It guarantees bandwidth

• It is shared and less secure

• It is limited to local use only

Why are serial communications preferred for long-distance WAN connections?

• They use multiple wires for faster data

• They transmit data simultaneously

• They minimize timing synchronization issues

• They require no conversion

Which device connects a subscriber’s LAN to the WAN communication device?

• DCE

• DTE

• CPE

• CSU/DSU

Why might a company use a dual-carrier WAN connection?

• To increase security only

• To reduce service provider costs

• To improve redundancy and availability

• To limit bandwidth

Which technology uses coaxial cable for high-speed internet access?

• DSL

• Cable

• Fiber

• WiMAX

An enterprise wants to interconnect several LANs using a cost-effective, flexible technology. Which is most suitable?

• Circuit-switched PSTN

• Packet-switched MPLS

• Leased line T1

• ISDN