ETCP IP and Transport Networks 1 — Questions and Answers
Question 1: Which routing protocol is most commonly used for inter-domain routing in Ericsson transport network deployments?
- OSPF
- BGP (Correct answer)
- IS-IS
- RIP
Correct answer: BGP
BGP (Border Gateway Protocol) is the standard inter-domain routing protocol used between autonomous systems in transport networks.
Question 2: In Ericsson's IP/MPLS transport, what does LSP stand for?
- Label Switched Path (Correct answer)
- Link State Protocol
- Logical Service Plane
- Layer Switching Point
Correct answer: Label Switched Path
LSP stands for Label Switched Path, the end-to-end path established through an MPLS network for forwarding labeled packets.
Question 3: What is the primary purpose of MPLS Traffic Engineering (TE) in Ericsson transport networks?
- Encrypting data in transit
- Optimizing bandwidth utilization across network paths (Correct answer)
- Providing IP address assignment
- Managing VLAN segmentation
Correct answer: Optimizing bandwidth utilization across network paths
MPLS-TE allows operators to optimize bandwidth by directing traffic along specific paths rather than relying solely on shortest-path routing.
Question 4: Which Ericsson router platform is designed for high-capacity IP/MPLS core network deployments?
- SSR 8000
- SEIL X4
- Ericsson Router 6000 (Correct answer)
- Smart Edge 6000
Correct answer: Ericsson Router 6000
The Ericsson Router 6000 series is purpose-built for high-capacity core and edge IP/MPLS deployments.
Question 5: What does QoS DSCP marking do in an Ericsson IP transport network?
- Assigns VLANs to traffic flows
- Marks packets to indicate their priority for handling (Correct answer)
- Encrypts headers for security
- Compresses packet payloads
Correct answer: Marks packets to indicate their priority for handling
DSCP (Differentiated Services Code Point) marks packets in the IP header so network nodes can apply appropriate priority treatment.
Question 6: In Ericsson transport, what is the role of a Route Reflector in BGP?
- To translate between IPv4 and IPv6
- To reduce the number of BGP sessions required in an AS (Correct answer)
- To assign MPLS labels to packets
- To balance load between WAN links
Correct answer: To reduce the number of BGP sessions required in an AS
A Route Reflector allows BGP route propagation within an AS without requiring a full mesh of iBGP sessions between all routers.
ETCP IP and Transport Networks 1
Which routing protocol is most commonly used for inter-domain routing in Ericsson transport network deployments?