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642-885 PDF DEMO:

QUESTION NO: 1
Which multicast routing protocol is most optimal for supporting many-to-many multicast applications?
A. PIM-SM
B. PIM-BIDIR
C. MP-BGP
D. DVMRP
E. MSDP
Answer: B
Explanation:
PIM-Bidirectional Operations PIM Bidirectional (BIDIR) has one shared tree from sources to RP and from RP to receivers. This is unlike the PIM-SM, which is unidirectional by nature with multiple source trees - one per (S, G) or a shared tree from receiver to RP and multiple SG trees from RP to sources.
Benefits of PIM BIDIR are as follows:
As many sources for the same group use one and only state (*, G), only minimal states are required in each router.
No data triggered events.
Rendezvous Point (RP) router not required. The RP address only needs to be a routable address and need not exist on a physical device.

QUESTION NO: 2
Which two actions result when a network administrator attempts to ping an IPv6 host on the
LAN? (Choose two.)
A. ARP is used to determine the MAC address of the destination host.
B. Neighbor Discovery is used to determine the MAC address of the destination host.
C. Neighbor Solicitation messages are sent out by the source host to determine the data link-layer address of the destination host.
D. Neighbor Advertisement messages are sent by the source host to announce its presence on the local link.
E. Router Solicitation messages are sent out on a specific multicast address to request the data link- layer address of the target device.
F. Router Solicitation messages are sent to the local router on the network segment to request data link-layer information about the destination host.
Answer: B,C

QUESTION NO: 3
Which of the following can be used by dual-stack service providers supporting IPv4/IPv6 customers with dual-stack hosts using public IPv6 addresses and private IPv4 addresses?
A. NAT64
B. 6RD
C. 6to4 tunnels
D. Carrier-grade NAT
Answer: D
Explanation:
Carrier Grade NAT is a large-scale NAT, capable of providing private-IPv4-to-public-IPv4 translation in the order of millions of translations. Carrier Grade NAT can support several hundred thousand subscribers with the bandwidth throughput of at least 10Gb/s full-duplex. With IPv4 addresses reaching depletion, Carrier Grade NAT is vital in providing private IPv4 connectivity to the public IPv4 internet. In addition, Carrier Grade NAT is not limited to IPv4 NAT; it can also translate between IPv4 and IPv6 addresses.

QUESTION NO: 4
Refer to the Cisco IOS-XR show output exhibit.
Which two statements are correct? (Choose two.)
A. The RPF neighbor 192.168.11.1 is the path towards the RP for the 224.1.1.1 multicast group
B. The RP for the 224.1.1.1 multicast group is reachable over the Gi0/0/0/0 interface
C. This router is the RP for the 224.1.1.1 multicast group
D. Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/0 interface
E. Incoming 224.1.1.1 multicast group traffic will be sent out through the Gi0/0/0/2 interface
Answer: A,D

QUESTION NO: 5
Which two options areadvantages of an IPv6 dual-stack implementation in an enterprise environment? (Choose two.)
A. simplifies the route redistribution policies complexity
B. requires IPv6-to-IPv4 translation on the uplinks to the service providers
C. provides built-in support for Kerberos authentication
D. does not have to worry about NAT traversal
E. supports multicast properly
Answer: D,E

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Updated: May 27, 2022