WAN Terms

Question 1

POTS

Answer 1

Plain Old Telephone Service

Question 2

PSTN

Answer 2

Public switched telephone network

Question 3

ISDN

Answer 3

Integrated Services Digital Network

Supports multiple 64-kbps B (Bearer) channels

Question 4

Frame Relay

Answer 4

Frame Relay sites connected to virtual circuits (VC)

VCs are point-to-point or point-to-multipoint

Question 5

SONET

Answer 5

Synchronous Optical Network

Layer 1 technology using fiber as media

▪ High data rates (155 Mbps to 10 Gbps)
▪ Covers large distances (20 km to 250 km

Question 6

(MPLS)

Answer 6

Multiprotocol Label Switching

Label switching is more efficient than Layer 3 IP address routing ▪ Used by service providers for forwarding data in the backend, the customer remains unaware of the details

Question 7

(DMVPN)

Answer 7

Dynamic Multipoint Virtual Private Network

Allow Internet to be used as WAN connection for secure site-to-site communication ▪ VPN tunnel has authentication and encryption so users on the unsecure network cannot read or decrypt the traffic without proper keys
▪ Can connect remote locations with low cost, instead of dedicated or leased-line access