單項(xiàng)選擇題What is the port number of an IPsec Encapsulating Security Payfoad packet？（）

A.UOP port 50
B.IP protocol 51
C.TCP port 51
D.TCP port 50
E.IP protocol 50
F.UDP port51


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1.單項(xiàng)選擇題What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）

A.IP unicast in IP unicast
B.IP multicast in IP anycast
C.IP anycast in IP anycast
D.IP multicast in IP unicast
E.IP multicast in IP multicast
F.IP unicast in IP multicast

2.多項(xiàng)選擇題For SONET ring switching， the 50ms switch time： Select all that apply？（）

A.Plncludes the detection time
B.Applies to rings smaller than 1200km
C.Applies to rings smaller than 1000km
D.Includes up to 16 nodes

4.單項(xiàng)選擇題What does FRTP stand for？（）

A.Frame Relay Top Pseudowire
B.Frame Relay Traffic Pseudowire
C.Frame Relay Traffic Protocol
D.Frame Relay Traffic Policing

5.單項(xiàng)選擇題GMPLS is based upon Non-Packet-based devices.（）

A.True
B.False

6.單項(xiàng)選擇題Which of the following is true regarding Label Distribution Protocol （LDP）？（）

A.It is a label distribution protocol for MPLS
B.It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network
C.Tag distribution Protocol （TDP） was the basis for LDP
D.All of the above are true

8.單項(xiàng)選擇題What is the main difference between the information displayed on the dspload and the dsptrkutl screens？（）

A.The dspload screen is for all trunks； the dsptrkutl screen is for one trunk
B.The dspload screen shows the expected traffic； the dsptrkutl screen shows actual traffice
C.The information on the dspload screen never changes； the dsptrkutl screen is dynamic
D.The dspload screen shows historical information； the dsptrkutl screen shows current information

9.單項(xiàng)選擇題In a cable HFC plant， what is a modulator？（）

A.Set top box
B.Diplex filter
C.Local head end
D.Fiber node

10.單項(xiàng)選擇題What is the purpose of Dual Ring Interconnect with D C for SDH rings？（）

A.Protects signals when a ring switch fails
B.Protects signals when multiple span switches fail
C.Protects pre-emptible traffic from being dropped when a ring switch occurs
D.Protects signals against any combination of link failure in each ring