Telecommunications Telecommunications Protocols 3

Question 1

What is the function of PPP in WAN communications?

Accepted Answer

Provide a standard data link protocol for point-to-point serial connections

Answer

Encrypt all WAN traffic by default

Answer

Multiplex multiple VLANs over a WAN

Answer

Assign IP addresses via DHCP over WAN

Question 2

What does the DSCP EF (Expedited Forwarding) designation ensure for voice traffic?

Accepted Answer

Low latency, low jitter, and low packet loss treatment

Answer

Guaranteed encryption

Answer

Highest possible compression

Answer

Shortest-path routing only

Question 3

What is the purpose of IEEE 802.1Q in Ethernet networks?

Accepted Answer

Enable VLAN tagging in Ethernet frames

Answer

Define PoE power delivery standards

Answer

Specify wireless security protocols

Answer

Standardize Ethernet cable categories

Question 4

What does an SLA (Service Level Agreement) typically specify for telecom services?

Accepted Answer

Guaranteed uptime, latency, jitter, and packet loss thresholds

Answer

Hardware specifications for customer premises equipment

Answer

Software licensing terms for network management

Answer

Routing protocol configurations required

Question 5

What protocol does IPsec use for key exchange?

Accepted Answer

IKE (Internet Key Exchange)

Answer

SSL

Answer

RADIUS

Answer

Kerberos

Question 6

What is Frame Relay primarily known as in telecom history?

Accepted Answer

A legacy packet-switched WAN technology using virtual circuits

Answer

A modern SD-WAN architecture

Answer

A type of wireless relay station

Answer

An early form of optical switching