Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）A、Frame RelayB、HDLCC、x.25D、PPP
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）
- A、Frame Relay
- B、HDLC
- C、x.25
- D、PPP
相关考题：
Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true? (Select two answer choices)A. The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.B. The DHCP Discover message uses UDP as the transport layer protocol.C. The DHCP Discover message uses a special Layer 2 multicast address as the destination address.D. The DHCP Discover message uses TCP as the transport layer protocol.E. The DHCP Discover message does not use a Layer 2 destination address.F. The DHCP Discover message does not require a transport layer protocol.
TCP/IP is a communication protocol, which provides many different networking services. The TCP/IP Internet protocol suite is formed from two standards: the TCP （Transmission Control Protocol） and the IP（Internet Protocol）.（72） means it is on the transport layer.A.ISOB.IPC.OSID.TCP
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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. PAPD. EAP-MSCHAPv2
At which of the following layers does the TCP protocol operate?() A.Layer 1B.Layer 4C.Layer 6D.Layer 7
In the "host to host" layer of the DOD model, which of the following is a valid connection oriented protocol?() A.ARPB.RARPC.TCPD.UDPE.IPF.ICMPG.BootP
Which two of these are characteristics of MPLS VPNs?() A. Layer 3 MPLS VPNs can forward only IP packetsB. Layer 2 MPLS VPNs can forward any network protocolC. MPLS label paths are automatically formed based on Layer 2 framesD. Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE. In Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built－in security mechanisms?() A. Frame RelayB. HDLCC. x.25D. PPP
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、PAPD、EAP-MSCHAPv2
In the "host to host" layer of the DOD model, which of the following is a valid connection oriented protocol?（）A、ARPB、RARPC、TCPD、UDPE、IPF、ICMPG、BootP
Which of the following options lists the steps in PPP session establishment in the correct order?（）A、Optional authentication phase, link establishment phase, network layer protocol phase.B、Network layer protocol phase, link establishment phase, optional authentication phase.C、Network layer protocol phase, optional authentication phase, link establishment phase.D、Link establishment phase, network layer protocol phase, optional authentication phase.E、Link establishment phase, optional authentication phase, network layer protocol phase.F、Optional authentication phase, network layer protocol phase, link establishment phase.
Which of the following is a connectionless transport layer protocol？（）A、 TCPB、 HTTPC、 SMTPD、 UDP
Regarding DHCP (dynamic host configuration protocol), which two of the following choices below are true?（）A、The DHCP Discover message uses FF-FF-FF-FF-FF as the Layer 2 destination address.B、The DHCP Discover message uses UDP as the transport layer protocol.C、The DHCP Discover message uses a special Layer 2 multicast address as the destination address.D、The DHCP Discover message uses TCP as the transport layer protocol.E、The DHCP Discover message does not use a Layer 2 destination address.F、The DHCP Discover message does not require a transport layer protocol.
At which layer of the OSI model does the Spanning Tree Protocol （STP） operate at？（）A、Layer 5B、Layer 4C、Layer 3D、Layer 2E、Layer 1
Which two of these are characteristics of MPLS VPNs？ （）A、 Layer 3 MPLS VPNs can forward only IP packetsB、 Layer 2 MPLS VPNs can forward any network protocolC、 MPL S label paths are automatically formed based on Layer 2 framesD、 Layer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesE、 In Layer 2 MPLS VPNS， the service provider controls the customer Layer 3 policies
Which two of these are characteristics of the 802.1Q protocol?（）A、it is a layer 2 messaging protocol which maintains vlan configurations across network.B、it includes an 8-bit field which specifies the priority of a frame.C、it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.D、it modifies the 802.3 frame header,and thus requires that the FCS be recomputed.E、it is a trunking protocol capable of carring untagged frames.
At which of the following layers does the UDP protocol operate?（）A、Layer 1B、Layer 4C、Layer 6D、Layer 7
Which of the following is a connection oriented transport layer protocol？ （）A、 TCPB、 UDPC、 TFTPD、 SNMP
单选题Which of the following options lists the steps in PPP session establishment in the correct order?（）AOptional authentication phase, link establishment phase, network layer protocol phase.BNetwork layer protocol phase, link establishment phase, optional authentication phase.CNetwork layer protocol phase, optional authentication phase, link establishment phase.DLink establishment phase, network layer protocol phase, optional authentication phase.ELink establishment phase, optional authentication phase, network layer protocol phase.FOptional authentication phase, network layer protocol phase, link establishment phase.
单选题At which layer of the OSI model does the Spanning Tree Protocol （STP） operate at？（）ALayer 5BLayer 4CLayer 3DLayer 2ELayer 1
单选题Which protocol is used for communication between the Junos Pulse client and 802.1X-compliant switches when performing Layer 2 enforcement?（）AEAPBRADIUSCSSLDEAP-o-HTTP
多选题Which two of these are characteristics of MPLS VPNs?（）ALayer 3 MPLS VPNs can forward only IP packetsBLayer 2 MPLS VPNs can forward any network protocolCMPLS label paths are automatically formed based on Layer 2 framesDLayer 3 MPLS VPNs can forward any network protocol based on Layer 2 framesEIn Layer 2 MPLS VPNS, the service provider controls the customer Layer 3 policies
单选题In the "host to host" layer of the DOD model, which of the following is a valid connection oriented protocol?（）AARPBRARPCTCPDUDPEIPFICMPGBootP
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?（）AEAP-TLSBEAP-MD5CPAPDEAP-MSCHAPv2
多选题Which two of these are characteristics of the 802.1Q protocol?（）Ait is a layer 2 messaging protocol which maintains vlan configurations across network.Bit includes an 8-bit field which specifies the priority of a frame.Cit is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.Dit modifies the 802.3 frame header,and thus requires that the FCS be recomputed.Eit is a trunking protocol capable of carring untagged frames.
单选题Which of the following is a connection oriented transport layer protocol？ （）A TCPB UDPC TFTPD SNMP
单选题Which of the following is a connectionless transport layer protocol？（）A TCPB HTTPC SMTPD UDP