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单选题
Which protocol is an open standard protocol framework that is commonly used in VPNs,to provid secure end-to-end communication?（）
A
L2TP
B
IPsec
C
PPTP
D
RSA
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考题
单选题Which protocol is an open standard protocol frame work that is commonly used in VPNs，to provid secureend-to-end communication？（）A
L2TPB
IPsecC
PPTPD
RSA
考题
单选题Which protocol supports LDP sessions?（）A
SIP (port 626)B
TCP (port 646)C
UDP (port 606)D
IP (protocol code LDP)
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多选题Which three statements are true about TACACS+？（）AIt is a Cisco proprietary protocol.BIt runs on TCP port 59. .CAuthentication and authorization are done at different stages.DTACACS+ encrypts the entire body of the packet， but leaves a standard TACACS+ header.EIt is an industry standard protocol.FTACACS+ encrypts both the entire body of the packet and the TACACS+ header.
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单选题Which IEEE standard protocol is initiated as a result of successful DTP completion in a switch overFastEthernet？（）A
802.3adB
802.1wC
802.1QD
802.1d
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单选题A customer is trying to decide which 802.1X inner protocol to use on their network. The customer requires that nopasswords be sent across the network in plain text, that the protocol be supported by the Windows native supplicant,and that the protocol supports password changes at Layer 2. Which protocol would meet the customers needs?（）A
EAP-TLSB
EAP-MD5C
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EAP-MSCHAPv2
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单选题Which of the following is true regarding Label Distribution Protocol （LDP）？（）A
It is a label distribution protocol for MPLSB
It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a networkC
Tag distribution Protocol （TDP） was the basis for LDPD
All of the above are true
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多选题Which three things are the building blocks of the Cisco VPLS architecture？（）AVLAN Trunk Protocol （VTP）BState Synchronization Protocol （SSP）CL2VPNDEthernet Virtual Switch Interface （VSI）ELabel Distribution Protocol （LDP）
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单选题Which of the following is a disadvantage of using the EIGRP protocol?（）A
It does not scale wellB
It converges slower than OSPFC
It is a proprietary protocolD
It is a distance vector protocol
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SMBB
RTSPSC
CIFSD
HTTPS
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单选题If you needed to transport traffic coming from multiple VLANs （connected between switches）， and your CTO was insistent on using an open standard，which protocol would you use？（）A
802.11BB
spanning-treeC
802.1QD
ISLE
VTPF
Q.921
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