(71) In the strength of the carrier signal is varied to represent binary 1 or 0．(72) is a system that can map a name to an address and conversely an address to an name．(73) is a three-way handshaking authentication protocol that it's packets are encapsulated in the point-to-point protocol(74) is an approach that enables an ATM Switch to behave like a LAN switch．(75) is an guided media which is made of glass or plastic and transmits signals in the form. of light．(71)

A．ASK

B．PSK

C．FSK

D．FDM(72)

A．NAT

B．NCP

C．DDN

D．DNS(73)

A．PPP

B．PAP

C．CHAP

D．LCP(74)

A．VLAN

B．LANE

C．VPN

D．IPOA(75)

A．Coaxial cable

B．Optical fiber

C．Unshielded Twisted-pair Cable

D．Shielded Twisted-pair Cable

[单选题]In the strength of the carrier signal is varied to represent binary 1 or 0.(72) is a system that can map a name to an address and conversely an address to an name.(73) is a three-way handshaking authentication protocol that it's packets are encapsul

[单选题]In(66)the strength of the carrier signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address and conversely an address to al name.(68)is a three-way handshaking authentication protocol that it's packets are encapsu

[单选题]The strength of a deck will be increased by adding（）.A . camberB . deck beam bracketsC . hatch beamsD . sheer

[问答题] 载体（carrier）

[名词解释] carrier载波

[单选题]It is easy tomisjudge the [strength] of the wind.A.forceB. directionC. temp

[单选题]What provides the majority of strength to an aluminum-sided container?（）.A . Corner fittingsB . Framework，primarily the corner postsC . Framework and siding acting as a girderD . Aluminum side and end panel

[判断题]Consolidation can also benefit the carrier， sincethe carrier does not have

[判断题]Consolidation can also benefit the carrier， sincethe carrier does not have

[问答题] 术语翻译：Carrier（）