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Share some CCIE 400-101 exam questions and answers below.
Which statement about EIGRP request packets is true?
A. They are transmitted unreliably.
B. They are transmitted via broadcast.
C. They determine whether a destination is reachable.
D. They are sent in response to query.
Answer: A
Which IPv6 migration method allows IPv4-only devices to communicate with IPv6-only devices?
A. GRE tunnel
B. dual stack
C. ISATAP tunnel
D. NAT64
Answer: D
What are two mechanisms that directed ARP uses to help resolve IP addresses to hardware addresses? (Choose two)
A. It removes address-resolution restrictions, allowing dynamic protocols to advertise rou information for the device loopback address.
B. It uses ICMP redirects to advertise next-hop addresses to foreign hosts.
C. It uses series of ICMP echo messages to relay next-hop addresses.
D. It removes address-resolution restrictions, allowing dynamic protocols to advertise routing information for the next-hop address.
E. It uses a proxy mechanism to allow a device to respond to ARP requests for the addresses of other devices.
Answer: BD
Which mechanism does GET VPN use to preserve IP header information?
A. IPsec tunnel mode
B. GRE
C. MPLS
D. IPsec transport mode
Answer: A
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