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单选题
On which destination port in the Layer 4 header does BGP listen?（）
A
UDP port 169
B
TCP port 169
C
UDP port 179
D
TCP port 179
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When an SRX series device receives an ESP packet, what happens?（）A、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it willB、If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.D、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.
考题
单选题Which header or set of headers does CRTP compress？ （）A
Layer 2B
Layer 3C
Layer 4D
Layer 2 and Layer 3E
Layer 3 and Layer 4
考题
多选题Which of the following statements are true regarding Layer 3 switches？（Choose all that apply.）（）AA routed port does not run STP or DTPBA routed port is considered to be in a down state if it is not operational at both Layer 1 andLayer 2CAn SVI is considered to be in a down state if it is not operational at both Layer 1 and Layer 2DAn SVI is considered to be in a down state only when none of the ports in the correspondingVLAN are activeEAn SVI port does not run 5TP or DTPFTo create a trunk， an SVI can be logically divided into subinterfaces
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单选题Which of the following is a characteristic of a data center core？（）A
Server-to-server traffic always remains in the core layer.B
The recommended practice is for the core infrastructure to be in Layer 3.C
The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D
The Cisco Express Forwarding hashing algorithm is the default， based on the IP address andLayer 4 port.E
Core layer should run BGP along with an IGP because iBGP has a lower administrativedistance than any IGP.
考题
单选题Which OSI layer header contains the address of a destination host that is another network?（）A
applicationB
presentationC
sessionD
transportE
networkF
data linkG
physical
考题
单选题Which of the following is a characteristic of a data center core?（）A
Server-to-server traffic always remains in the core layer.B
The recommended practice is for the core infrastructure to be in Layer 3.C
The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.D
The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4 port.E
Core layer should run BGP along with an IGP becauseiBGP has a lower administrative distance than any IGP.
考题
单选题When an SRX series device receives an ESP packet, what happens?（）A
If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it willB
If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC
If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.D
If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.
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单选题Which QoS preclassification option will require the use of the qos pre-classify command for the VPN traffic？ （）A
VPN traffic needs to be classified based on the Layer2 header informationB
VPN traffic needs to be classified based on the IP precedence or DSCPC
VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP addressD
VPN traffic with Authentication Header （AH） needs to preserve the ToS byte
考题
单选题Where is the MPLS label imposed？（）A
after the Layer 3 header and before the Layer 2 payloadB
after the Layer 3 header and before the Layer 4 payloadC
after the Layer 2 header and before the Layer 1 payloadD
after the Layer 1 header and before the Layer 2 payloadE
after the Layer 2 header and before the Layer 3 payload
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