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Which one of the WAN data-link protocols below is used for out-of-band signaling?（）
- A、HDLC
- B、NCP
- C、PAP
- D、LAPD
- E、LAPB
- F、None of the above
参考答案
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Which one of the WAN data－link protocols below is used for out－of－band signaling?()
A. HDLCB. NCPC. PAPD. LAPDE. LAPBF. None of the above
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A．the one provided in a dictionary
B．the one which best fits the context
C．the central or core meaning of the item
D．the one which is assumed to be correct
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B.[m]
C.[b]
D.[p]
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单选题Which one of the WAN data-link protocols below is used for out-of-band signaling?（）A
HDLCB
NCPC
PAPD
LAPDE
LAPBF
None of the above
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单选题A company has a Frame Relay WAN with one central - site router and 100 branch office routers. A partial mesh of PVCs exists: one PVC between the central site and each of the 100 branch routers. Which of the following could be true about the number of EIGRP neighbor ships?（）A
A partial mesh totaling 100: one between the central - site router and each of the 100 branches.B
A full mesh - (101 * 100) / 2 = 5050 - One neighborship between each pair of routers.C
101 - One between each router (including the central site) a nd its nearby PE router.D
None of the answers is correct.
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单选题Which of the following sets of consonants differs only in one distinctive feature? _____A
[v][z][3][θ]B
[t][z][ʃ][ð]C
[s][v][ɜ][p]D
[p][d][z][S]
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单选题The Testking Corporation consists of the head office in New York with its regional offices in: Chicago, Detroit, Philadelphia, Toronto, and Atlanta. These offices need to be connected in a WAN, and Testking wishes to do this via a hub and spoke arrangement that will utilize packet-switched technology.Which one of the WAN technologies below would be the best choice for Testking?（）A
ISDNB
WirelessC
Frame RelayD
T1 leased lineE
ATMF
VPN
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单选题Let @ represent one of the four basic arithmetic operations such that, for any nonzero real numbers P and Q, P @ 0=P and P @ Q=Q @ P. Which arithmetic operation(S) does the symbol @ represent?A
×onlyB
+onlyC
-onlyD
-and×E
+and÷
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单选题Which one below has the proper word stress？A
/p/，/b/，/m/B
/θ/，/ʒ/，/h/C
/g/，/h/，/k/D
/g/，/ŋ/，/k/
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单选题Which of the pair can be distinguished by only one feature?A
/s,/z/B
/p/,/d/C
/g/,/h/D
/ l/,j/
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