350-401 Practice Test 50 — 15 Questions

Question 1

Drag and drop the steps of MP-BGP VPNv4 route advertisement between PE routers into the correct order, from first to last.

Accepted Answer

Local PE learns CE route via IGP or static. The correct order starts with the local PE learning the customer route via IGP or static, then redistributing it into MP-BGP with a route distinguisher, advertising the VPNv4 route to the remote PE, which receives and installs it into the VRF, and finally the remote PE redistributes the route into the customer-facing IGP.

Question 2

Which two statements about BGP neighbor states are true? (Choose two.)

Accepted Answer

In the Idle state, BGP is waiting for a start event before initiating a TCP connection.. The BGP neighbor state machine includes Idle, Connect, Active, OpenSent, OpenConfirm, and Established. In the Idle state, BGP does not initiate any connection and may be waiting for a start event. In the Active state, BGP is actively trying to establish a TCP connection. In the Established state, BGP has successfully formed a peering session and is exchanging routing updates. The OpenSent state is when BGP has sent an OPEN message and is waiting for an OPEN message from the peer. The Connect state is when BGP is waiting for the TCP connection to complete.

Answer

In the Established state, BGP has sent an OPEN message but has not yet received an OPEN message from the peer.

Answer

In the OpenSent state, BGP is waiting for the TCP connection to complete.

Answer

In the Connect state, BGP is actively trying to establish a TCP connection.

Question 3

Which two statements about VRF configuration in Cisco IOS-XE are true? (Choose two.)

Accepted Answer

A VRF instance maintains its own routing table, CEF table, and forwarding table.. Correct: VRF instances use separate routing tables and can be used with OSPF. Incorrect: VRFs do not require MPLS; VLANs are not automatically associated; VRF-lite does not support MPLS; VRF is not a Layer 2 concept.

Answer

VRF requires MPLS to be enabled on the router.

Answer

A VRF is automatically associated with all VLANs on a switch.

Answer

VRF is a Layer 2 isolation mechanism.

Question 4

Drag and drop the steps of EIGRP variance-based unequal-cost load balancing into the correct order, from first to last.

Accepted Answer

Verify feasible successors in the topology table. To enable unequal-cost load balancing, first ensure feasible successors exist, then set the variance multiplier, optionally adjust the metric offset, and finally verify the load sharing across multiple paths.

Question 5

Drag and drop the steps of VRF import/export route-target policy flow into the correct order, from first to last.

Accepted Answer

Configure export RT on local VRF. The order starts with configuring the export RT on the VRF, the PE advertising the VPNv4 route with that RT, the remote PE receiving the route and comparing the RT with its import RT list, if matched the route is imported into the VRF, and finally the route is installed in the VRF routing table.

Question 6

Which three statements about OSPF area types are correct? (Choose three.)

Accepted Answer

A stub area blocks Type 5 AS External LSAs but allows Type 3 Summary LSAs and a default route.. OSPF area types control the propagation of LSAs. A standard area can carry all LSA types. A stub area blocks Type 5 LSAs but allows Type 3. A totally stubby area blocks both Type 5 and Type 3 (except a default route). A not-so-stubby-area (NSSA) blocks Type 5 but allows Type 7 for external routes. A totally NSSA further blocks Type 3.

Answer

A not-so-stubby-area (NSSA) allows Type 5 LSAs to be imported from external networks.

Answer

A totally NSSA blocks Type 3 LSAs but allows Type 5 LSAs from external sources.

Question 7

Which two statements about EIGRP feasible successors are true? (Choose two.)

Accepted Answer

A feasible successor must have a reported distance less than the feasible distance of the current successor.. A feasible successor is a backup route that meets the feasibility condition (reported distance < feasible distance). It is stored in the topology table, not the routing table, and is used immediately if the successor fails.

Answer

A feasible successor is installed in the routing table as a backup route.

Answer

The feasible successor must have the same metric as the successor.

Answer

EIGRP uses the Diffusing Update Algorithm (DUAL) to determine feasible successors.

Question 8

Drag and drop each EIGRP state on the left to its matching DUAL stage on the right.

Accepted Answer

Passive: Route is stable and no DUAL computation is in progress. Passive is the stable state; Active is when DUAL is actively searching for a new route; Stuck in Active occurs when a query is not answered within the active timer.

Question 9

Drag and drop the steps of OSPFv3 IPv6 neighbor adjacency formation into the correct order, from first to last.

Accepted Answer

Router sends Hello with its router ID. OSPFv3 neighbor formation follows the same state machine as OSPFv2: Down, Init, 2-Way, ExStart, Exchange, Loading, Full. The steps reflect the key actions at each state.

Question 10

Drag and drop the steps of SR-IOV configuration for VM network bypass into the correct order, from first to last.

Accepted Answer

Enable SR-IOV in server BIOS. SR-IOV configuration starts with enabling SR-IOV in the BIOS. Then, virtual functions (VFs) are created on the physical NIC. Next, the hypervisor is configured to pass a VF to the VM. After that, the VM is assigned the VF as a PCI device. Finally, the VM boots and uses the VF directly.

Question 11

Drag and drop each VRF-Lite vs MPLS VPN characteristic on the left to its matching description on the right.

Accepted Answer

VRF-Lite: Uses only VRFs without MPLS labels for path isolation. VRF-Lite uses only VRFs without MPLS labels; MPLS VPN uses labels for isolation; VRF-Lite is limited to a single router; MPLS VPN scales across the core; VRF-Lite does not require MP-BGP; MPLS VPN uses MP-BGP for VPNv4 route exchange.

Question 12

Drag and drop the steps of iBGP route reflection configuration into the correct order, from first to last.

Accepted Answer

Enable BGP process and define local AS. First, you enable the BGP process and define the local AS. Then you configure the router as a route reflector using the neighbor route-reflector-client command. Next, you specify the cluster ID if needed, then adjust the next-hop behavior with next-hop-self. Finally, you verify the configuration with show ip bgp neighbors.

Question 13

Drag and drop the steps of NAT overload (PAT) packet translation process into the correct order, from first to last.

Accepted Answer

Host sends packet with private source IP and port. PAT translates private source IPs to a public IP with unique port numbers. The host sends a packet, the router creates a translation entry, replaces the source IP and port, forwards the packet, and reverses the process on the return.

Question 14

Drag and drop the steps of MPLS Traffic Engineering (TE) tunnel setup (RSVP) into the correct order, from first to last.

Accepted Answer

Configure IGP extensions (OSPF/IS-IS) for TE. MPLS TE tunnel setup begins with IGP extension configuration to propagate link attributes, followed by explicit path definition. RSVP-TE then signals the tunnel using PATH messages, which are processed by intermediate routers to reserve bandwidth. Finally, RESV messages confirm the reservation and establish the tunnel.

Question 15

Drag and drop the steps of SD-WAN overlay routing protocol (OMP) route advertisement sequence into the correct order, from first to last.

Accepted Answer

Edge device learns local routes via connected/static/dynamic. In OMP, the sequence starts with the edge device learning routes locally (connected, static, or dynamic), then redistributing them into OMP and sending to vSmart. vSmart processes and installs routes in its RIB, then advertises the best routes to other edge devices. The receiving edge device installs the route in its forwarding table and optionally redistributes into its local routing protocol.