300-420 Practice Test

An engineer is designing an enterprise campus network. The LAN infrastructure consists of
switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop
prevention mechanism. All configured
VLANs must be grouped in two SIP instances. Which standards-based Spanning Tree
technology supports this design solution?

A.

MSTP

B.

RSTP

C.

Rapid PVST

D.

STP

An ISP provides Layer 3 VPN service over MPLS to a customer with four branches and
multiple CE routers at
each branch. To exchange the routes that are learned from the CE routers, which BGP
address family should
the ISP activate among the PE routers?

A.

address-family multicast

B.

L2VPN EVPN

C.

VPNv4 unicast

D.

IPv4 unicast

Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

A network engineer must segregate three interconnected campus networks using IS-IS
routing. A two-layer hierarchy must be used to support large routing domains and to avoid
more specific routes from each campus network being advertised to other campus network
routers automatically. Which two actions does the engineer take to accomplish this
segregation? (Choose two.)

A.

Designate two IS-IS routers as BDR routers at the edge of each campus, and configure
one BDR for all Level 1 routers and one BDR for all Level 2 routers.

B.

Designate two IS-IS routers from each campus to act as Level 1/Level 2 backbone
routers at the edge of each campus network.

C.

Assign the same IS-IS NET value for each campus, and configure internal campus
routers with Level 1/ Level 2 routing.

D.

Utilize different MTU values for each campus network segment. Level 2 backbone
routers must utilize a larger MTU size of 9216.

E.

Assign a unique IS-IS NET value for each campus, and configure internal campus

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