Which protocol is normally used to communicate errors or other conditions at the IP la
A.TCP
B.ICMP
C.SNMP
D.UDP
A.TCP
B.ICMP
C.SNMP
D.UDP
第1题
A. ordinary clock
B.border clock
C.transparent transmission clock
D.transparent transmission clock
第2题
A.manual mode
B.SSM protocol mode
C.Auto Select mode
D.1588 optimal main clock
第4题
第5题
A.who
B.what
C.which
D.that
第6题
Which of the following can be seen as the effect of the Montreal Protocol?
A.Increase of CFC pollution.
B.Ozone improvement in the upper stratosphere.
C.Ozone improvement in the lower stratosphere.
D.Increase of bromine gas levels in the atmosphere.
第7题
Which of the following can be best used as the title of the passage?
A.Some Good News About the Ozone
B.The Montreal Protocol
C.The Ozone and CFC
D.CFC and Methyl Bromide
第8题
A.nSignal failure switching of tunnel depends on whether port is dow
B.nSignal failure switching of tunnel depends on whether CC packets are lost
C.n1:1 switching of tunnel depends on APS protocol and is bidirectional switching
D.n1+1 switching of tunnel depends on APS protocol and is unidirectional switching
第9题
According to the study led by Mr. Newchurch, which of the following statements is TRUE?
A.The ozone layer was increasing by 8 percent every 10 years since the late 1970s.
B.In the past few years, the decrease rate of the ozone has been steady.
C.The atmosphere is beginning to gain ozone now.
D.We'll have a full recovery of ozone in 50 years if the Montreal Protocol is well observed.
第10题
A.It uses signed certificates to authenticate the server’s public key.
B.A 128 bit value is used during the handshake protocol that is unique to the connection.
C.It uses only 40 bits of secret key within a 128 bit key lengt
D.Every message sent by the SSL includes a sequence number within the message contents.
第11题
A.PTN62006300 can implement exchange of monitoring packets through gateway board and MSTP device.
B.Monitoring packets of PTN network are forwarded through layer 3 routes, without tunnel/PW encapsulation and decapsulation.
C.PTN devices, defined by distinct protocol standards G.8114 and Y.1731, cannot exchange monitoring packets with each other.
D.A PTN6100 can learn 150 mac addresses per second.