Designing Cisco Enterprise Networks (ENSLD) v1.0
Question 1
Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 does not become a transit AS. Which filtering solution must the architect choose?
- A. no-advertise
- B. next-hop
- C. no-export
- D. maximum-prefix
Answer : C
Question 2
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
✑ conserve bandwidth, memory, and CPU processing
✑ prevent suboptimal routing
avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
- A. route summarization
- B. prefix lists
- C. distribute lists
- D. stub routing
- E. static redistribution
Answer : AC
Question 3
Refer to the exhibit. An architect must design a solution to connect the two ASs. To optimize bandwidth, the design will implement load sharing between router R6 and router R1. Which solution should the design include?
- A. Use update-source to specify the Loopback interface.
- B. Use next-hop-self attributes only for routes that are learned from eBGP peers.
- C. Configure the eBGP TTL to support eBGP multihop.
- D. Use maximum-paths to install multiple paths in the routing table.
Answer : D
Question 4
A customer's environment includes hosts that support IPv6-only. Several of these hosts must communicate with a public web server that has only IPv4 domain name resolution. Which solution should the customer use in this environment?
- A. utilize NAT64 to translate the addresses
- B. implement NAT44 at the edge of the customer network
- C. use 6to4 and a tunnel to translate the addresses
- D. implement 6PE to resolve hostname resolution
Answer : A
Question 5
A company is planning to open two new branches and allocate the 2a01:c30:16:7009::3800/118 IPv6 network for the region. Each branch should have the capacity to accommodate a maximum of 200 hosts. Which two networks should the company use? (Choose two.)
- A. 2a01:0c30:0016:7009::3a00/120
- B. 2a01:0c30:0016:7009::3b00/121
- C. 2a01:0c30:0016:7009::3a80/121
- D. 2a01:0c30:0016:7009::3c00/120
- E. 2a01:0c30:0016:7009::3b00/120
Answer : AE
Question 6
Refer to the exhibit.
A network engineer must improve the current IS-IS environment. The Catalyst switch is equipped with dual supervisors. Each time a stateful switchover occurs, the network experiences unnecessary route recomputation. Which solution addresses this issue if the upstream router does not understand graceful restart messaging?
- A. Enable IS-IS remote LFA FRR on both devices.
- B. Enable NSR on the switch.
- C. Enable NSF on the switch.
- D. Configure ISIS aggressive timers on both devices.
Answer : C
Question 7
Refer to the exhibit.
An architect must design an IGP solution for an enterprise customer. The design must support:
✑ Physical link flaps should have minimal impact.
✑ Access routers should converge quickly after a link failure.
Which two ISIS solutions should the architect include in the design? (Choose two.)
- A. Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.
- B. Advertise the IS-IS interface and loopback IP address toward the Internet and data center.
- C. Reduce SPF and PRC intervals to improve convergence time.
- D. Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.
- E. Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 / Level 2 adjacency.
Answer : CD
Question 8
Refer to the exhibit.
An engineer is designing a routing solution for a customer. The design must ensure that a failure of network 10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not impact the core. It also requires fast convergence time during any link failover in the core or access networks.
Which solution must the engineer select?
- A. Add aggregation layer between core and access networks.
- B. Enable graceful restart on routers A and C.
- C. Enable FRR for the connected networks of routers A and C.
- D. Enable summarization on routers A and C.
Answer : C
Question 9
Refer to the exhibit.
A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?
- A. Modify the next-hop attribute on R3.
- B. Use AS-Path prepending on R3.
- C. Modify the next-hop attribute on R4.
- D. Use AS-Path prepending on R4.
Answer : D
Question 10
Refer to the exhibit.
An architect must design a solution that uses the direct link between R1 and R2 for traffic from 10.10.10.0/24 toward network 10.10.20.0/24. Which solution should the architect include in the design?
- A. Configure the OSPF cost of the link to a value lower than 30.
- B. Lower the Administrative Distance for OSPF area 0.
- C. Place the link into area 2 and install a new link between R1 and R2 in area 0.
- D. Configure the link to provide multiarea adjacency.
Answer : A
Question 11
Refer to the exhibit.
An engineer must design a WAN solution so that ISP-1 is always preferred over ISP-2. The path via ISP-2 is considered as a backup and must be used only when the path to ISP-1 is down. Which solution must the engineer choose?
- A. R1: - Routes advertised to ISP-1: 0x AS-path prepend - Routes received from ISP-1: HIGH local-preference - Routes advertised to R2: no action - Routes received from R2: community NO-EXPORT R2: - Routes advertised to ISP-2:5x AS-path prepend - Routes received from ISP-2: LOW local-preference - Routes advertised to R1: community NO-ADVERTISE - Routes received from R1: no action
- B. R1: - Routes advertised to ISP-1: 0x AS-path prepend - Routes received from ISP-1: HIGH local-preference - Routes advertised to R2: community NO-EXPORT - Routes received from R2: no action R2: - Routes advertised to ISP-2: 5x AS-path prepend - Routes received from ISP-2: LOW local-preference - Routes advertised to R1: no action - Routes received from R1: no action
- C. R1: - Routes advertised to ISP-1: 0x AS-path prepend - Routes received from ISP-1: LOW local-preference - Routes advertised to R2: community NO-ADVERTISE - Routes received from R2: no action R2: - Routes advertised to ISP-2: 5x AS-path prepend - Routes received from ISP-2: HIGH local-preference - Routes advertised to R1: no action - Routes received from R1: community NO-ADVERTISE
- D. R1: - Routes advertised to ISP-1: 5x AS-path prepend - Routes received from ISP-1: LOW local-preference - Routes advertised to R2: community NO-ADVERTISE - Routes received from R2: no action R2: - Routes advertised to ISP-2: 0x AS-path prepend - Routes received from ISP-2: HIGH local-preference - Routes advertised to R1: community NO-EXPORT - Routes received from R1: no action
Answer : B
Question 12
Which feature must be incorporated into the campus LAN design to enable Wake on LAN?
- A. dynamic ARP Inspection Snooping on layer 2 devices
- B. directed broadcasts on layer 3 devices
- C. proxy ARP on layer 3 devices
- D. DHCP Snooping on layer 2 devices
Answer : B
Question 13
Refer to the exhibit. An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access layer and the distribution layer?
- A. Add a link between access switch A and access switch B
- B. Reconfigure the distribution switch A to become the HSRP Active
- C. Change the link between distribution switch A and distribution switch B to be a routed link
- D. Create an EtherChannel link between distribution switch A and distribution switch B
Answer : B
Question 14
Which first hop redundancy protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?
- A. GLBP
- B. IRDP
- C. VRRP
- D. HSRP
Answer : A
Question 15
A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link. Which approach achieves this goal and does not impact router CPU utilization?
- A. Utilize BFD and tune the multiplier to 50
- B. Lower the BGP hello interval
- C. Decrease the BGP keepalive timer
- D. Utilize BFD and keep the default BGP timers
Answer : C