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H12-221-ENU PDF DEMO:
QUESTION NO: 1
In a multicast network environment, if IGMPv1 hosts and IGMPv2 routers (hereinafter referred to as version 1 hosts and version 2 routers) are co-located on the same LAN, how do they work together? (Multiple Choice)
A. If there is a version 1 host in the LAN, all hosts must be required to use version 1.
B. Membership reports sent by version 1 hosts are always received by version 2 routers.
C. If a version 1 host exists in a specific group, the version 2 router must ignore any outgoing messages received in that group.
D. Version 2 routers must set a group-related countdown timer that considers the existence of the
Version 1 host.
Answer: B,C,D
QUESTION NO: 2
Regarding the description of the working mechanism of IGMP Snooping, which is correct?
A. If GMP sent by the host leaves the packet, the switch adds the host to the corresponding multicast table.
B. The Layer 2 switch establishes and maintains MAC broadcast address table at Layer 2 by continuously monitoring IGMP messages.
C. When IGMP Snooping is not running, multicast packets will be broadcast on Layer 2. After IGMP
Snooping is run, packets will not be broadcast on Layer 2 but Layer 2 multicast.
D. If the host send GMP host report packet, the switch deletes the multicast entry corresponding to the host.
Answer: C
QUESTION NO: 3
In BGP routing rules, routes with high MED values take precedence.
A. True
B. False
Answer: B
QUESTION NO: 4
When the Hold Time parameter negotiated by the two BGP neighbors is 0, no Keeplive packet is sent.
A. False
B. True
Answer: B
QUESTION NO: 5
IGMP Snooping operates at the data link layer to manage and control multicast groups and solves the problem of multicast messages broadcast at Layer 3.
A. True
B. False
Answer: B
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Updated: May 28, 2022