单选

(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.

  • A.ASK
  • B.PSK
  • C.FSK
  • D.FDM
参考答案
您可能感兴趣的试题

(82)

  • A.Coaxial cable
  • B.Optical fiber
  • C.Unshielded Twisted-pair Cable
  • D.Shielded Twisted-pair Cable

(81)

  • A.VLAN
  • B.LANE
  • C.VPN
  • D.IPOA

(79)

  • A.NAT
  • B.NCP
  • C.DDN
  • D.DNS

(80)

  • A.PPP
  • B.PAP
  • C.CHAP
  • D.LCP

(76)

  • A.material
  • B.equipment
  • C.medium
  • D.channel

(77)

  • A.repeaters
  • B.radars
  • C.telephones
  • D.antennas

(74)

  • A.reflex
  • B.distort
  • C.bend
  • D.absorb

(75)

  • A.transmitted
  • B.transformed
  • C.converted
  • D.delivered

(72)

  • A.connect
  • B.control
  • C.configure
  • D.confirm
¥

订单号:

遇到问题请联系在线客服

订单号:

遇到问题请联系在线客服