SP Network Infrastructure and Protocols 2

Question 1

What technology allows service providers to create isolated virtual networks over shared physical infrastructure?

Accepted Answer

VLANs

Answer

STP

Answer

PAT

Answer

ARP

Question 2

In an MPLS VPN architecture, what is a Route Distinguisher (RD) used for?

Accepted Answer

Make overlapping customer IP addresses unique in the provider's VRF table

Answer

Encrypt customer routing tables

Answer

Define QoS policies per customer

Answer

Identify the physical port on a PE router

Question 3

Which monitoring protocol do service providers use to collect metrics from network devices like routers and switches?

Accepted Answer

SNMP

Answer

FTP

Answer

Telnet

Answer

SMTP

Question 4

What is the purpose of Bidirectional Forwarding Detection (BFD) in service provider networks?

Accepted Answer

Rapidly detect link or path failures between network nodes

Answer

Encrypt tunnel traffic between PE routers

Answer

Assign MPLS labels to packets

Answer

Balance traffic across multiple ISP uplinks

Question 5

A service provider uses RADIUS for what primary function?

Accepted Answer

Authentication, Authorization, and Accounting for network access

Answer

Routing protocol updates

Answer

Resolving domain names to IP addresses

Answer

Distributing MPLS labels

Question 6

What does 'network convergence' mean in the context of service provider routing?

Accepted Answer

The time it takes all routers to update their tables after a topology change

Answer

Combining multiple ISP connections into one

Answer

Encrypting all routing protocol messages

Answer

Scaling bandwidth dynamically with traffic demand