单项选择题

Which functionality is required within an IP router that is situated at the boundary of an IPv4 network and an IPv6 network to allow communication between IPv6- only and IPv4 - only nodes?（）

A. Autoconfiguration
B. Automatic 6to4 Tunnel
C. Automatic 6to4 Relay
D. Network Address Translator - Protocol Translator (NAT - PT)
E. Intrasite Automatic T unnel Address Protocol (ISATAP)

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单项选择题

Which BGP feature shou ld be used to avoid high memory utilization on a router?（）

A. soft - reconfiguration
B. route refresh
C. BGP communities
D. full - mesh BGP peering

单项选择题

Which BGP option i s required when load sharing over multiple equal - bandwidth parallel links from a single CE router to a single ISP router over eBGP?（）

A. eBGP Multipath
B. eBGP Multihop
C. BGP Synchronization
D. Public AS numbers

单项选择题

Refer to the above exhibit. Why are the EIGRP neighbors for this router not learning the routes redistributed from OSPF?（）

A. Redistribution must be enabled mutually (in both directions) to work correctly.
B. auto - summary causes the OSPF routes redistributed into EIGRP to be summarized; thus the OSPF network 116.16.34 is summarized to 116.3 4.0.0, which is already covered by the EIGRP protocol.
C. Default metrics are not configured under EIGRP.
D. Both routing protocols must have unique autonomous system numbers for redistribution to function correctly.