道路运输爆炸品时,无外包装的金属桶只能单层摆放,以免压力过大或撞击摩擦引起爆炸。（) A:正确 B:

igned by the IETF to（）the current version Intemet Protocol，IP Version 4("IPv4”)． A．substitution B．swap C．switchover D．replace

●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

igned by the IETF to（）the current version Intemet Protocol，IP Version 4("IPv4”)． A．substitution B．swap C．switchover D．replace

igned by the IETF to（）the current version Intemet Protocol，IP Version 4("IPv4”)． A．substitution B．swap C．switchover D．replace

signed 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

signed 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

s policy server role. You need to disable IPv6 for all connections except for the tunnel interface and the IPv6 loopback interface. What should you do？（）

A.Run the netsh ras ipv6 set command.

B.Run the netsh interface ipv6 delete command.

C.Run ipv6.exe and remove the ipv6 protocol.

D.From the local area connection properties, uncheck internet protocol versions 6 (TCP/IPv6).

A. An IPv6 address is 128 bits long.

B. An IPv6 header contains the header checksum field.

C. An IPv6 header is 20 bits long.

D. An IPv6 header contains the next header field.

E. IPv6 route rs send RA messages.

F. An IPv6 header contains the protocol field.

A.RIPng

B.OSPFv3

C.IS-IS for IPv6

D.static