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CCIE Routing and Switching Written Exam v5.1

QUESTION 761

Refer to the exhibit. The VLAN-to-MST mapping is shown. (Assume SW1 acts as root for all possible MST instances.)

 

spanning-tree mst configuration name MST?

 

revision 2?

 

instance 0 vlan 1-200,301-4094 instance 1 vlan 201-300

 

!

 

If this topology is deployed, which action is required for traffic to flow on VLAN 200 and 300?

 

clip_image001

 

A.

Map VLAN 300 to instance 0.

B.

Map VLAN 200 to instance 2.

C.

Move instance 0 root to SW2.

D.

Move instance 1 root to SW2.

E.

Map both VLANs to instance 2.

 

Correct Answer: B

 

 

QUESTION 762

Which two statements about VRRP are true? (Choose two.)

 

A.

It is assigned multicast address 224.0.0.18.

B.

The TTL for VRRP packets must be 255.

C.

It is assigned multicast address 224.0.0.9.

D.

Its IP protocol number is 115.

E.

Three versions of the VRRP protocol have been defined.

F.

It supports both MD5 and SHA1 authentication.

 

Correct Answer: AB

 

 

QUESTION 763

DRAG DROP

Drag each routing protocol on the left to the matching statement on the right.

 

clip_image003

 

Correct Answer:

clip_image005

 

 

 

QUESTION 764

Which two statements about IBGP multipath are true? (Choose two.)

 

A.

The IGP metric of the BGP next hop can be different from the best-path IGP metric if you configure the router for unequal-cost IBGP multipath.

B.

The IGP metric of the BGP next hop must be the same as the best-path IGP metric.

C.

The equivalent next-hop-self is performed on the best path from among the IBGP multipaths before it is forwarded to external peers.

D.

The path should be learned from an external neighbor.

E.

The router BGP process must learn the path from a confederation-external or external neighbor.

F.

The router BGP process must learn the path from an internal neighbor.

 

Correct Answer: AF

 

 

QUESTION 765

Which statement about a P router in a Layer 3 MPLS VPN is true?

 

A.

It is unaware of VPN routes.

B.

It connects to customer edge routers.

C.

It participates in MPLS VPN routing.

D.

It uses the running IGP to share VPN routes.

 

Correct Answer: A

 

 

QUESTION 766

Which two statements about PIM-DM are true? (Choose two.)

 

< tr style="mso-yfti-irow: 2">

A.

It forwards multicast packets on a source tree.

B.

It requires an RP.

C.

It forwards multicast packets on a shared distribution tree.

D.

It floods multicast packets to neighbors that have requested the data.

E.

It floods multicast packets throughout the network.

F.

It forwards multicast packets to neighbors that have requested the data.

 

Correct Answer: AE

 

 

QUESTION 767

Which two statements about the MAC address table space are true? (Choose two.)

 

A.

You can disable learning on a VLAN to reduce table-space requirements.

B.

When you disable learning on a VLAN with an SVI, IP packet flooding in the Layer 2 domain is also disabled.

C.

Unicast, multicast, and broadcast MAC address filtering is configured globally and disabled by default.

D.

The default setting for static MAC addresses to age out of the MAC address table is 300 seconds.

E.

Turning off MAC learning on VLANs 900 through 1005 disables learning on VLANs 900 through 1001.

 

Correct Answer: AE

 

QUESTION 768

Which statement about LISP encapsulation in an EIGRP OTP implementation is true?

 

A.

OTP uses LISP encapsulation for dynamic multipoint tunneling.

B.

OTP maintains the LISP control plane.

C.

OTP uses LISP encapsulation to obtain routes from neighbors.

D.

LISP learns the next hop.

 

Correct Answer: A

 

 

QUESTION 769

Refer to the exhibit. Which two benefits result from using this command on a switch? (Choose two.)

 

clip_image006

 

A.

The port cannot forward unknown unicast packets.

B.

Network security is increased on the configured port.

C.

The port cannot forward unknown multicast packets.

D.

The port cannot forward unknown broadcast packets.

E.

Network security is increased on all ports of the switch.

F.

Unknown packets of all types, except unicast, are blocked.

 

Correct Answer: AB

 

 

QUESTION 770

Which three statements about the default behaviour of eBGP sessions are true? (Choose three.)

 

A.

eBGP sessions between sub-ASs in different confederations transmit the next hop unchanged.

B.

The next hop in an eBGP peering is the IP address of the neighbor that announced the route.

C.

When a route reflector reflects a route to a client, it transmits the next hop unchanged.

D.

The next hop in an eBGP peering is the loopback address of the interface that originated the route.

E.

The next hop in an eBGP peering is the loopback address of the neighbor that announced the route.

F.

When a route reflector reflects a route to a client, it changes the next hop to its own address.

 

Correct Answer: ABC

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