SP Network Infrastructure and Protocols

Question 1

Which protocol is used by service providers to dynamically exchange routing information between autonomous systems?

Accepted Answer

BGP

Answer

Border Gateway Protocol (BGP) is the standard inter-domain routing protocol used between service provider autonomous systems on the internet.

Question 2

What technology do service providers use to forward packets based on labels rather than IP addresses?

Accepted Answer

MPLS

Answer

Multiprotocol Label Switching (MPLS) enables service providers to forward packets using short label values, improving speed and enabling traffic engineering.

Question 3

In a service provider network, what is the role of a Provider Edge (PE) router?

Accepted Answer

Connects the provider network to customer sites via CE routers

Answer

A Provider Edge (PE) router sits at the boundary between the service provider network and customer CE routers, handling MPLS VPN label operations.

Question 4

What does QoS stand for and why is it critical in service provider networks?

Accepted Answer

Quality of Service — prioritizes traffic to meet performance SLAs

Answer

Quality of Service (QoS) allows service providers to prioritize latency-sensitive traffic like voice and video to ensure SLA performance commitments are met.

Question 5

Which protocol automatically assigns IP addresses to devices in a service provider managed network?

Accepted Answer

DHCP

Answer

Dynamic Host Configuration Protocol (DHCP) automatically assigns IP addresses, subnet masks, gateways, and DNS servers to network devices.

SP - Certified Service Provider Practice Test

SP - Certified Service Provider Practice Test

SP Network Infrastructure and Protocols