Cisco ENCOR Cisco ENCOR 350-401 2 — Questions and Answers
Question 1: Which OSPF network type does NOT elect a DR/BDR by default?
- Broadcast
- Non-broadcast
- Point-to-point (Correct answer)
- Point-to-multipoint
Correct answer: Point-to-point
Point-to-point OSPF network types do not elect a DR or BDR because there are only two routers on the link.
Question 2: A network engineer needs to prevent a specific BGP prefix from being advertised to an eBGP peer. Which mechanism is most appropriate?
- Route reflector
- Outbound route filter with a prefix-list (Correct answer)
- BGP confederations
- MED attribute adjustment
Correct answer: Outbound route filter with a prefix-list
An outbound route filter using a prefix-list applied to the neighbor statement blocks specific prefixes from being sent to an eBGP peer.
Question 3: Which QoS mechanism discards lower-priority packets during congestion to avoid tail-drop?
- CBWFQ
- WRED (Correct answer)
- LLQ
- Traffic shaping
Correct answer: WRED
Weighted Random Early Detection (WRED) proactively drops lower-priority packets before queues fill completely, avoiding global synchronization from tail-drop.
Question 4: In EIGRP, what is the Feasible Distance (FD)?
- The metric of the best route as reported by a neighbor
- The total metric from the local router to the destination (Correct answer)
- The administrative distance of the route
- The bandwidth of the outgoing interface
Correct answer: The total metric from the local router to the destination
The Feasible Distance is the metric calculated by the local router for the best path to a destination, combining the reported distance and local link cost.
Question 5: Which 802.1Q feature allows a trunk port to carry untagged traffic for a specific VLAN?
- VLAN pruning
- Native VLAN (Correct answer)
- Extended VLAN range
- Voice VLAN
Correct answer: Native VLAN
The native VLAN on an 802.1Q trunk carries frames without a VLAN tag; both ends of the trunk must agree on the same native VLAN.
Question 6: What does the 'ip helper-address' command accomplish on a Cisco router?
- Enables HSRP on the interface
- Forwards UDP broadcast packets to a specified unicast address (Correct answer)
- Configures a static NAT entry
- Enables DHCP server functionality locally
Correct answer: Forwards UDP broadcast packets to a specified unicast address
The ip helper-address command converts UDP broadcasts (including DHCP discover packets) into unicast packets forwarded to the specified server address.
Question 7: Which spanning tree port state forwards traffic AND learns MAC addresses?
- Blocking
- Listening
- Learning
- Forwarding (Correct answer)
Correct answer: Forwarding
Only the Forwarding state allows a port to both pass data traffic and populate the MAC address table.
Cisco ENCOR Cisco ENCOR 350-401 2
Which OSPF network type does NOT elect a DR/BDR by default?