Which two statements about BFD are correct? (Choose two)
A. BFD provides link failure detection for static routes.
B. BFD modifies each protocol timer to improve link failure detection.
C. NSR maintains BFD sessions during Routing Engine switchover.
D. GRES is required for BFD sessions to be established.
Your customer's enterprise is adding geographically-dispersed branch offices and requires new WAN
connections. The primary design consideration for this expansion is low cost but the branches must remain
secure with low latency.
Which type of Internet access model satisfies the customer's requirement in this scenario?
A. distributed model with security at the hub
B. centralized model with security at the hub
C. centralized model with security at each branch
D. distributed model with security at each branch
Your customer wants an MPLS-based L3VPN service between multiple remote locations. Which two statements are true regarding the customer's WAN edge devices? (Choose two )
A. They must have EBGP configured.
B. They require routes for all remote sites.
C. They must have MPLS configured.
D. They require IP connectivity with the PEs.
Your organization maintains container-based applications hosted by two different cloud service providers.
You are asked to design a Layer 2 connection between the two cloud data centers. The data center
interconnect solution must support control plane MAC learning.
Which Layer 2 data center interconnect model satisfies this requirement?
A. L3VPN
B. L2VPN
C. VPLS
D. EVPN
You are asked to design a BNG solution using MX Series routers You want to dynamically assign per-
subscriber configuration parameters using VSAs.
Which external service is required to accomplish this task?
A. DHCP
B. 802.1X
C. RADIUS
D. TACACS
Your backbone network has a single dark fiber between two backbone sites within the same metro area.
Currency this link is being used as a point-to-point 100ObE link between the routers using gray optics. The
link has been experiencing high utilization and you are asked to propose network design changes to
increase capacity across this network segment.
Which statement is true in this scenario?
A. New optical interfaces will need to be added to the routers.
B. Interfaces need to be reconfigured for 200GbE.
C. Gray optics can be used to increase capacity by enabling additional wavelengths.
D. Enabling MPLS will increase capacity due to statistical multiplexing.
Your customer's WAN edge connects to two service providers SP-A and SP-B. The customer is advertising a single /22 subnet to both service providers through EBGP peering sessions. The customer wants to influence inbound traffic to the advertised /22 destination prefix so that it passes through SP-A when both paths are operational. Which action meets the customer's requirement?
A. Advertise the prefix to SP-B with a higher local preference.
B. Advertise the prefix to SP-A with a higher local preference.
C. Prepend your AS number multiple times on the prefix advertised to SPA.
D. Prepend your AS number multiple times on the prefix advertised to SP-B.
Your customer connects to their service providers using fiber-based Ethernet connections in a shared
collocation room. The customer has expressed concerns about wire tapping and man-in-the-middle
attacks, and has asked for your design recommendation to minimize such attacks.
Which service addresses the customer's concern?
A. 802 1x
B. MACsec
C. BGPFIowSpec
D. 802 3ad
Your customer is deploying a data center with redundant connections for WAN services through ISP-1 and ISP-2. Your customer has decided to deploy an active/passive Internet connection uplink model and pay-per-use for a passive connection associated with ISP-2. The customer wants to ensure limited use of the connection through ISP-2. Which two actions would you perform to meet the objective? (Choose two )
A. Extend the AS Path length on the prefix advertised to ISP-1 to influence ingress traffic to enter through ISP-1.
B. Use MED and Origin to direct northbound traffic flows out ISP-1
C. Extend the AS Path length on the prefix advertised to ISP-2 to influence ingress traffic to enter through ISP-1.
D. Use Local Preference to direct northbound traffic flows out ISP-1
Exhibit: Within ISP E, R1 is load-balancing traffic destined to ISP D over the R1-R2-R5 and R1-R4-R5 paths. At some point, a link degradation event occurs in the network as shown in the exhibit. You want R1 to rapidly learn of the path failure.
A. Adjust the OSPF hello timer to a subsecond value between R1 and R4.
B. Enable Bidirectional Forwarding Detection between R1 and R4.
C. Enable Bidirectional Forwarding Detection between R4 and R5.
D. Adjust the OSPF hello timer to a subsecond value between R4 and R5.
