ENSA - Module 7 - WAN Concepts

What are two common types of circuit-switched WAN technologies? (Choose two)

• ISDN
• ATM
• Frame Relay
• PSTN
• DSL

What is the recommended technology to use over a public WAN infrastructure when a branch office is connected to the corporate site?

• VPN
• DSL
• ATM
• MPLS
• WIFi

Which medium do service providers use to transmit data over WAN connections with SONET, SDH, and DWDM?

• Copper
• Fibre
• Satellite
• WiFi
• Cable

Which type of WAN network design is the most fault-tolerant?

• Point-to-Point
• Partially meshed
• Hub and Spoke
• Dual-homed
• Fully Meshed

Which two statements about the WAN OSI Layer 1 are true? (Choose two.)

• It includes protocols such as PPP, HDLC and Ethernet
• It describes how data will be encapsulated into a frame
• It describes the electrical, mechanical and operational components needed to transmit bits
• It includes protocols such as SDH, SONET and DWDM

Which public WAN access technology utilizes copper telephone lines to provide access to subscribers that are multiplexed into a single T3 link connection?

• PSTN
• DSL
• IDSN
• Cable
• Dialup

A customer needs a metropolitan area WAN connection that provides high-speed, dedicated bandwidth between two sites. Which type of WAN connection would best fulfill this need?

• Ethernet WAN
• Packet-switched network
• MPLS
• Frame-relay
• Circuit-switched network

Which WAN connectivity option is based on Ethernet LAN technology?

• DSL
• Cable
• Metro Ethernet
• MPLS
• ATM

Which two statements about the relationship between LANs and WANs are true? (Choose two.)

• LANs and WANs con not be connected

• LANs connect mulitple WANs together
• WANs connect LANs at slower speeds than LANs connect their internal end devices
• WANs must be publicy owned, but LANs can be owned by either public or private entities
• WANs are typically operated through multiple ISPs, but LANs are typically operated by single organizations or individuals

What WAN terminology describes the Demarcation Point?

• Point where the subscriber connects to the ISP network
• The copper of fibre cable that connects the CPE to the CO of the ISP
• Connects multiple access nodes of the ISP
• Physical location in a building or complex that seperates the CPE from ISP equipment
• The local service provider facilty or building that connects the CPE to the ISP network