单选题Internet Protocol version 6 （IPv6） is the next-generation Internet Layer protocol for packet-switched internetworks and the Internet. IPv6 router solicitation is（）A A request made by a node for the IP address of the local routerB A request made by a no

IPv6 is short for“Internet Protocol Version 6”．IPv6 is the “next generation” protocol designed by the IETF to（ ）the current version Intemet Protocol，IP Version 4("IPv4”)． A．substitution B．swap C．switchover D．replace

A.RIPng

B.OSPFv3

C.static

D.IS-IS for IPv6

●Ipv6 is (71) for "Internet Protocol Version 6"。Ipv6 is the "next generation" protocol design by the IETF to (72) the current version Inernet Protocol,IP Version 4．Most of today's internet uses Ipv4,which is now nearly twenty years old．Ipv4 has been remarkably resilient in spite of its age,but it is beginging to have problems．Most importantly ,there is a growing (73) of Ipv4 addresses,which are needed by all new machines added to the Internet．Ipv6 fixs a number of problems in Ipv4,shch as the (74) number of available Ipv4 addresses．It also adds many improvements to Ipv4 in areas such as souting and network autoconfiguration．Ipv6 is expected to gradually replace Ipv4 ,with the two coexing for a number of years during a transition (75) ．

(71) A．short

B．abbreviate

C．abbreviation

D．initial

(72) A．substitution

B．replace

C．switchover

D．swap

(73) A．scarcity

B．lack

C．deficiency

D．shortage

(74) A．restrict

B．limited

C．imprison

D．confine

(75) A．period

B．days

C．epoch

D．phase

Ipv6 is(71)for "Internet Protocol Version 6"。Ipv6 is the "next generation" protocol design by the IETF to(72)the current version Inernet Protocol, IP Version 4. Most of today's internet uses Ipv4, which is now nearly twenty years old. Ipv4 has been remarkably resilient in spite of its age, but it is beginging to have problems. Most importantly, there is a growing(73)of Ipv4 addresses, which are needed by all new machines added to the Internet. Ipv6 fixs a number of problems in Ipv4, shch as the(74)number of available Ipv4 addresses. It also adds many improvements to Ipv4 in areas such as souting and network autoconfiguration. Ipv6 is expected to gradually replace Ipv4, with the two coexing for a number of years during a transition(75)A.

A．short

B．abbreviate

C．abbreviation

D．initial

IPv6 is short for "Internet Protocol Version 6". IPv6 is the "next generation" protocol designed by the IETF to(71) the current version Internet Protocol, IP version 4("IPv4").

Most of today's internet uses IPv4, which is now more than twenty years old. IPv4 has been(72) resilient in spite of its age, but it is beginning to have problems. Most importantly, there is a growing(73) of IPv4 addresses, which are needed by all new machines added to the Internet. IPv6 fixes a number of problems in IPv4, such as the(74) number of available IPv4 addresses. It also adds many improvements to IPv4 in areas such as routing and network autoconfiguration. IPv6 is expected to gradually replace IPv4, with the two coexisting for a number of years during a transition(75) .

A．substitution

B．swap

C．switchover

D．replace

阅读以下短文，回答98-100题。 【IPv6 is not interoperable with IPv4，In essence.it establishes a parallel version of the Internet not directly accessible with IPv4 sofeware.This means softwate upgrades or translator facilities are necessary for networking devices that need to communicate on both networks.Most modern computer operating systems already support both versions of the Internet Protocal.Network infrastrutures，however，are still lagging in this development.Aside form the complex array of physical connections that make up its infrastrure，the Internet is facilitated by bi- or multi-lateral commercial contracts(e.g. pearing agreements)，and by technical spesifications or protocals that describe how to exchange data over the network.Indeed，the Internet is defined by its interconnections and routing policies.】 Based on the paragraph above， it is shown that in order to deploy IPv6 protocol on the Internet，（）has to be built. The network devices which need to communicate with both networks are required to have upgraded software or （）in the movement of IPv4 to IPv6 transition，（）are relatively slow in this event.

A．separated network B．mobile network C．access network D．radio network

A．IPv6 software B．translator facilities C．operating systems D．IPv4 software

A．IPv4 network B．translator facilities C．operating systems D．network infrastructures