If the PFE does not have a route to the destination address of a packet, which action will be taken?（）A、The PFE floods the packet out of all interfaces.B、The PFE drops the packet and sends a destination unreachable notification back to source device.C、The PFE forwards the packet to the routing engine for furtherprocessing.D、The PFE queues the packet and sends are quest for a layer3 lookup to the routing engine.
If the PFE does not have a route to the destination address of a packet, which action will be taken?（）
- A、The PFE floods the packet out of all interfaces.
- B、The PFE drops the packet and sends a destination unreachable notification back to source device.
- C、The PFE forwards the packet to the routing engine for furtherprocessing.
- D、The PFE queues the packet and sends are quest for a layer3 lookup to the routing engine.
相关考题：
Router VE1 has just received a packet and needs to route it. What two actions must this router take in order to route incoming packets? (Choose two)A. Inspect the routing table to select the best path to the destination network addresses.B. Validate sources of routing information.C. Inspect the ARP table to verify a legitimate source MAC address for each packet.D. Identify the destination network address of each packet.E. Verify the receipt of routed packets by the next hop router.F. Identify the source network address of each packet.
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.
Which action does the ping 172.18.1.1 size 5 command perform?() A. It sends only five ping requests to the 172.18.1.1 destination.B. It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.C. It sends five rapid ping requests to the 172.18.1.1 destination.D. It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
Which statement describes the PFE?() A. The PFE controls the RE by providing Layer 2 and Layer 3 forwarding tablesB. The PFE implements advanced services such as policing, stateless firewall filtering, and class of serviceC. The PFE sends traffic to the RE for systematic packet forwardingD. The PFE receives hardware and environmental status messages from the RE
If the PFE does not have a route to the destination address of a packet, which action will be taken?() A.The PFE floods the packet out of all interfaces.B.The PFE drops the packet and sends a destination unreachable notification back to source device.C.The PFE forwards the packet to the routing engine for furtherprocessing.D.The PFE queues the packet and sends are quest for a layer3 lookup to the routing engine.
When an IP packet is Layer 3－switched from a source in one VLAN to a destination in another VLAN,which field in a packet will be rewritten? () A. Layer 2 TTLB. Layer 3 TTLC. Layer 3 source addressD. Layer 3 transport protocolE. Layer 3 destination address
A router receives a packet on interface 172.16.45.66／26. The source IP of the packet is 172.16.45.127／26 and the destination is 172.16.46.191／26.How will the router handle the packet?() A. The destination is a host on another subnet, so the router will not forward the packet.B. The destination is a host on the same subnet, so the router will forward the packet.C. The destination is a broadcast address, so the router will not forward the packet.D. The destination is a network address, so the router will forward the packet.
Regarding PAR (Positive Acknowledgement and Re－transmission), which of the answer choices below are correct?() A. The source device will only retransmit lost packets on the request of the destination device.B. The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires.C. The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent.D. The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects.E. If the destination device does not receive a segment, all segments are retransmitted.F. The source device keeps a record of all segments sent and expects and acknowledgment of each.
What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?() A. It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.B. It sends a copy of its neighbor table to all adjacent routers.C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
The following configuration line was added to router R1 Access－list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?() A.ermit all packet smatching the first three octets of the source address to all destinationsB.permit all packet matching the last octet of the destination address and accept all source addressesC.permit all packet matching the host bits in the source address to all destinationsD.permit all packet from the third subnet of the network address to all destinations
The following configuration line was added to router R1Access－list 101 permit ip 10.25.30.00.0.0.255 anyWhat is the effect of this access list configuration?() A.ermit all packets matching the first three octets of the source address to all destinationsB.permit all packet matching the last octet of the destination address and accept all source addressesC.permit all packet matching the host bits in the source address to all destinationsD.permit all packet from the third subnet of the network address to all destinations
The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）A、ermit all packet smatching the first three octets of the source address to all destinationsB、permit all packet matching the last octet of the destination address and accept all source addressesC、permit all packet matching the host bits in the source address to all destinationsD、permit all packet from the third subnet of the network address to all destinations
The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration？（）A、ermit all packets matching the first three octets of the source address to all destinationsB、permit all packet matching the last octet of the destination address and accept all source addressesC、permit all packet matching the host bits in the source address to all destinationsD、permit all packet from the third subnet of the network address to all destinations
When an IP packet is Layer 3-switched from a source in one VLAN to a destination in anotherVLAN, which field in a packet will be rewritten? （）A、Layer 2 TTLB、Layer 3 TTLC、Layer 3 source addressD、Layer 3 transport protocolE、Layer 3 destination address
If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）A、A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.B、An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.C、There is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.D、A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.E、A received labeled IP packet is forwarded based upon both the label and the IP address.F、A received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.
Assuming that an IP packet is sent from a source address in VLAN1 to a destination address in VLAN2 through a layer-3 switch, which part of the packet will be changed?（）A、Layer 2 TTLB、Layer 3 TTLC、Layer 3 source addressD、Layer 3 destination address
When an IP packet is Layer 3-switched from a source in one VLAN to a destination in another VLAN,which field in a packet will be rewritten? （）A、Layer 2 TTLB、Layer 3 TTLC、Layer 3 source addressD、Layer 3 transport protocolE、Layer 3 destination address
Which action does the ping 172.18.1.1 size 5 command perform?（）A、It sends only five ping requests to the 172.18.1.1 destination.B、It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.C、It sends five rapid ping requests to the 172.18.1.1 destination.D、It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
Which statement describes the PFE?（）A、The PFE controls the RE by providing Layer 2 and Layer 3 forwarding tablesB、The PFE implements advanced services such as policing, stateless firewall filtering, and class of serviceC、The PFE sends traffic to the RE for systematic packet forwardingD、The PFE receives hardware and environmental status messages from the RE
Which two statements are correct when you use the reject parameter as the next-hop value for a static route?（）A、The packet is dropped and the packet's source is marked with the no-readvertise parameter.B、The system sends the packet back to the source.C、The packet is dropped from the network.D、The system sends an ICMP message back to the source of the packet.
If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network（）。A、R1 will forward the packet out all interfaces.B、R1 will drop this packet because this it is not a valid IP address.C、As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.D、R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FFE、As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.
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.
多选题Which two statements are correct when you use the reject parameter as the next-hop value for a static route?（）AThe packet is dropped and the packet's source is marked with the no-readvertise parameter.BThe system sends the packet back to the source.CThe packet is dropped from the network.DThe system sends an ICMP message back to the source of the packet.
单选题A router receives a packet on interface 172.16.45.66/26. The source IP of the packet is 172.16.45.127/26 and the destination is 172.16.46.191/26.How will the router handle the packet?（）AThe destination is a host on another subnet, so the router will not forward the packet.BThe destination is a host on the same subnet, so the router will forward the packet.CThe destination is a broadcast address, so the router will not forward the packet.DThe destination is a network address, so the router will forward the packet.
单选题If the PFE does not have a route to the destination address of a packet, which action will be taken?（）AThe PFE floods the packet out of all interfaces.BThe PFE drops the packet and sends a destination unreachable notification back to source device.CThe PFE forwards the packet to the routing engine for furtherprocessing.DThe PFE queues the packet and sends are quest for a layer3 lookup to the routing engine.
单选题Which action does the ping 172.18.1.1 size 5 command perform?（）AIt sends only five ping requests to the 172.18.1.1 destination.BIt sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.CIt sends five rapid ping requests to the 172.18.1.1 destination.DIt sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
单选题When an IP packet is Layer 3-switched from a source in one VLAN to a destination in anotherVLAN, which field in a packet will be rewritten? （）ALayer 2 TTLBLayer 3 TTLCLayer 3 source addressDLayer 3 transport protocolELayer 3 destination address