300-420 Online Practice Questions and Answers

When a first hop redundancy solution is designed, which 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

An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?

A. BPDU Skew Detection

B. BPDU guard

C. loop guard

D. root guard

Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?

A. Make area 1 a NSSA.

B. Make area 1 a stub.

C. Make area 1 a standard OSPF area.

D. Make the area 1 routers part of area 0.

Since installing a cisco TelePresence system, the company is experiencing other application having response issues when the system in use. As a result, the company asked an architect to recommend a QoS solution. The customer is currently using a CBWFQ policy to manage traffic on an internet connection with a speed of 100 Mbps. Which link-capacity limit must the architect choose for strict-priority for the real-time traffic?

A. 25 Mbps

B. 50 Mbps

C. 33 Mbps

D. 75 Mbps

Refer to the exhibit

A customer requires maximum uptime for the data plane between R1 and R3 running OSPF

Which solution must the design include for high availability if the routing process on R2 requires maintenance?

A. BFD on all routers

B. nonstop forwarding on R1 and R3

C. nonstop forwarding on R3 only

D. graceful restart on all routers

What is a feature of the SaaS subscription model?

A. lower initial costs

B. web connection not required

C. autonomy and control over hardware

D. access to industrial-strength storage and computing power

What are the three foundational elements required for the new operational paradigm? (Choose three.)

A. application QoS

B. policy-based automated provisioning of network

C. multiple technologies at multiple OSI layers

D. assurance

E. centralization

F. fabric

Refer to the exhibit. An architect is designing an ISIS network for a customer migrating from IPv4 to IPv6. The current network uses narrow metrics, and the IPv6 areas will increase to 10 within the next two years. Also, IPv6 traffic must not blackhole in IPv4 network during the migration. Which two solutions must the architect choose? (Choose two.)

A. metric-style transition enabled on C1 and C2

B. metric-style transition enabled on all routers

C. multi-topology enabled under address-family ipv6 on E1 and E2

D. multi-topology enabled under address-family ipv6 on C1 and C2

E. metric-style transition enabled on E1 and E2

Which AES mode should be used in a Cisco SD-WAN environment that includes multicast applications?

A. Electronic Code Book (ECB)

B. Cipher Feedback (CFB)

C. Cipher Block Chaining (CBC)

D. Galois/Counter Mode (GCM)

An architect is designing a connectivity solution for a customer's two small branch offices. The customer wants a cost-effective design, no routing overhead, and some down time during the year is acceptable. Which connectivity solution must the architect choose?

A. single-homed

B. dual multihomed

C. single multihomed

D. dual-homed