Infrastructure: Free ENCOR 350-401 Practice Questions

Question 1

A junior network engineer asks why a router prefers an EIGRP-learned route over an OSPF-learned route when both protocols advertise the same destination network. The engineer is confused because the OSPF path has fewer hops. Which explanation best addresses the engineer's confusion?

The router selects the EIGRP route because EIGRP uses a feasible successor table that always provides a faster convergence path than OSPF The router selects the EIGRP route because EIGRP's hello timer interval is shorter, allowing it to populate the routing table before OSPF does The router selects the EIGRP route because its administrative distance of 90 is lower than OSPF's value of 110, regardless of hop count The router selects the EIGRP route because its composite metric of bandwidth and delay produces a more accurate cost than OSPF's hop count

Correct Answer: The router selects the EIGRP route because its administrative distance of 90 is lower than OSPF's value of 110, regardless of hop count

When multiple routing protocols advertise the same destination, the router uses administrative distance (AD) as the tiebreaker, and EIGRP's AD of 90 is lower than OSPF's AD of 110, so the EIGRP route is preferred regardless of any metric comparison.

The composite metric explanation is wrong because metrics are only compared between routes learned via the same protocol, not across different protocols. The feasible successor explanation is wrong because DUAL's convergence mechanism has no bearing on route selection between protocols. The hello timer explanation is wrong because route preference is determined by AD, not by which protocol populates the table first.

Key concept tested: administrative distance as the mechanism for selecting between routes learned from different routing protocols.

Question 2

A technician connects a new switch to an existing network. The trunk link needs to carry traffic for VLANs 1 through 50. What type of port should the technician configure on both switches to allow multiple VLANs across a single link?

Configure the ports as access ports and assign all 50 VLANs to each port Configure the ports as trunk ports using 802.1Q encapsulation Configure the ports as dynamic desirable ports using VTP transparent mode Configure the ports as trunk ports using EtherChannel bundling encapsulation

Correct Answer: Configure the ports as trunk ports using 802.1Q encapsulation

Trunk ports using 802.1Q encapsulation are specifically designed to carry traffic for multiple VLANs across a single physical link by tagging frames with VLAN identifiers.

Access ports can only be assigned to a single VLAN, so they cannot carry traffic for multiple VLANs simultaneously. EtherChannel is a link aggregation technology that bundles multiple physical links, not an encapsulation type for trunking. Dynamic desirable is a DTP negotiation mode, and VTP transparent mode relates to VLAN database propagation, neither of which directly configures a port to carry multiple VLANs.

Key concept tested: understanding 802.1Q trunk port configuration for carrying multiple VLANs over a single link.

Question 3

A company has two routers running HSRP. A junior engineer asks what the virtual IP address is used for in HSRP. Which answer best describes the purpose of the HSRP virtual IP address?

It serves as the peering address between the active and standby routers It serves as the default gateway for hosts on the LAN segment It serves as the source address for routing protocol updates It serves as the management IP used for SSH access to routers

Correct Answer: It serves as the default gateway for hosts on the LAN segment

The HSRP virtual IP address is configured as the default gateway for hosts on the LAN segment, allowing them to forward traffic to a single consistent gateway address regardless of which physical router is currently the active HSRP router.

The management IP used for SSH access is the router's own interface or loopback address, not the virtual IP. Routing protocol updates use the router's physical interface addresses as their source. HSRP peering between active and standby routers uses multicast hello messages sent from their real interface IPs, not the virtual IP.

Key concept tested: understanding the role of the HSRP virtual IP in providing first-hop redundancy for LAN hosts.

Infrastructure

ENCOR 350-401 - Infrastructure Example Questions

Question 1

Question 2

Question 3

Advance to CCNP Enterprise