SP Network Infrastructure and Protocols 3

Question 1

Which technology provides service providers with the ability to engineer traffic paths through their network?

Accepted Answer

MPLS Traffic Engineering (MPLS-TE)

Answer

Spanning Tree Protocol

Answer

Network Address Translation

Answer

Link Aggregation Control Protocol

Question 2

What is the primary advantage of a Carrier Ethernet service over traditional TDM circuits?

Accepted Answer

Scalable bandwidth, lower cost, and native IP support

Answer

Lower latency only

Answer

Guaranteed zero packet loss

Answer

No need for QoS configuration

Question 3

In service provider networks, what does 'last mile' refer to?

Accepted Answer

The connection between the provider's network and the customer's premises

Answer

The final router hop before the internet backbone

Answer

The last mile of fiber in a long-haul cable

Answer

The end-of-life stage of network equipment

Question 4

Which WAN technology uses label switching and provides L3VPN services over a provider backbone?

Accepted Answer

MPLS

Answer

Frame Relay

Answer

ATM

Answer

ISDN

Question 5

What is the role of a CDN (Content Delivery Network) for a service provider's customers?

Accepted Answer

Cache and deliver content from servers geographically close to end users

Answer

Provide centralized email archiving

Answer

Monitor DNS resolution speed

Answer

Issue SSL certificates to websites

Question 6

In BGP, what is the function of a Route Reflector?

Accepted Answer

Reduce the number of iBGP full-mesh sessions required in large provider networks

Answer

Mirror traffic for deep packet inspection

Answer

Encrypt BGP update messages

Answer

Translate between IPv4 and IPv6 prefixes