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.
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.
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阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the routers network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the routers routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.A．is generating B．generate C．is generated D．generates A．forwarding table B．network interfaces C．routing policies D．destination address A．the destination address and network interfaces B．forwarding table and network interfaces C．the destination address and forward table D．routing policies and routing table
Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network.Which of the following answers best describes the router‘s logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）A. When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interfaceB. When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC. When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD. When permitted by an ACL that was referenced in the associated crypto map
Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a shorter AS_Path Length, smaller MED, the same Weight, and smaller Local PreferencE.Which of the following is true about Router R1‘s choice of best path for this prefix?（）A. Route 1 is the best route.B. Route 2 is the best route.C. The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers .D. Neither route is considered best.
You have just configured a static default route on router TK1. What is the purpose of a default route?() A. It is a route to be used when the routing protocol fails.B. It is a route configured by an ISP that sends traffic into a corporate network.C. It is a route used when a packet is destined for a remote network that is not listed in the routing table.D. It is a route manually configured for a specific remote network for which a routing protocol is not configured.E. It is used to send traffic to a stub network.
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.
A router has EIGRP configured as the only routing protocol. How does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?() A. It immediately sends its entire routing table to its neighbors.B. EIGRP sends a Hello packet to the DR to inform it of the route failure.C. It automatically forwards traffic to a fallback default route until a successor route is found.D. It sends queries out to neighbors until a new successor route is found.E. It places the route in holddown until LSA updates inform it of a new route to the network.
A RIP router has an entry in the routing table for a specific network destination. It then gets updated with another entry for that same destination, but with a higher path cost (hop count) than the one already in the routing table.What will the router do in this situation?（）A. It will ignore the update and take no further action.B. It will add the update information to its routing table.C. It will replace the existing routing table entry with the update information.D. It will delete the existing routing table and will send out hello packets to rebuild the routing table.
A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight an d local preference values.Which statement is true about how BGP would select the best path?（）A. To influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local - preference 50B. Th e router will prefer the shortest autonomous system pathC. If the command bgp always - compare - med has been given, then the router will prefer the route with the highest MEDD. The router will prefer the route with the lower MED
Traditional network layer packet forwarding relies on the information provided by network layer （） protocols, or static routing, to make an independent （本题）decision at each hop within the network. The forwarding （）is based solely on the destination （）IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （）toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.A.switchB.hopC.hostD.cunstomer
You have just configured a static default route on router TK1. What is the purpose of a default route?（）A、It is a route to be used when the routing protocol fails.B、It is a route configured by an ISP that sends traffic into a corporate network.C、It is a route used when a packet is destined for a remote network that is not listed in the routing table.D、It is a route manually configured for a specific remote network for which a routing protocol is not configured.E、It is used to send traffic to a stub network.
Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network. Which of the following answers best describes the router's logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）A、When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interfaceB、When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC、When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD、When permitted by an ACL that was referenced in the associated crypto map
Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a shorter AS_Path Length, smaller MED, the same Weight, and smaller Local PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）A、Route 1 is the best route.B、Route 2 is the best route.C、The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers .D、Neither route is considered best.
Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）A、 Packets can arrive out of order.B、 Packets must take the same path to the destination.C、 Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.D、 Packets can experience varying delays across the network.E、 Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.
You have a router running BGP for the MPLS network and OSPF for the local LAN network at the sales office. A route is being learned from the MPLS network that also exists on the OSPF local network. It is important that the router chooses the local LAN route being learned from the downstream switch running OSPF rather than the upstream BGP neighbor. Also， if the local OSPF route goes away， the BGP route needs to be used. What should be configured to make sure that the router will choose the LAN network as the preferred path？（）A、static route needs to be addedB、floating static route needs to be addedC、bgp backdoor commandD、ospf backdoor command
Which two statements are true about the command ip route 172.16.3.0 255.255.255.0 192.168.2.4? (Choose two.)（）A、It establishes a static route to the 172.16.3.0 network.B、It establishes a static route to the 192.168.2.0 network.C、It configures the router to send any traffic for an unknown destination to the 172.16.3.0 network.D、It configures the router to send any traffic for an unknown destination out the interface with the address 192.168.2.4.E、It uses the default administrative distance.F、It is a route that would be used last if other routes to the same destination exist.
A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight an d local preference values. Which statement is true about how BGP would select the best path?（）A、To influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local - preference 50B、Th e router will prefer the shortest autonomous system pathC、If the command bgp always - compare - med has been given, then the router will prefer the route with the highest MEDD、The router will prefer the route with the lower MED
Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a longer AS_Path Length, bigger MED, bigger Weight, and smaller Loca l PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）A、Route 1 is the best route.B、Route 2 is the best route.C、The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers.D、Neither route is considered best.
Unicast Reverse Path Forwarding can perform all of these actions except which one？（）A、examine all packets received to make sure that the source addresses and source interfaces appear in the routing table and match the interfaces where the packets were receivedB、check to see if any packet received at a router interface arrives on the best return pathC、combine with a configured ACLD、log its events，if you specify the logging options for the ACL entries used by the unicast rpf commandE、inspect IP packets encapsulated in tunnels， such as GRE
A RIP router has an entry in the routing table for a specific network destination. It then gets updated with another entry for that same destination, but with a higher path cost (hop count) than the one already in the routing table. What will the router do in this situation?（）A、It will ignore the update and take no further action.B、It will add the update information to its routing table.C、It will replace the existing routing table entry with the update information.D、It will delete the existing routing table and will send out hello packets to rebuild the routing table.
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.
多选题Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）APackets can arrive out of order.BPackets must take the same path to the destination.COnce packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.DPackets can experience varying delays across the network.EPackets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.
单选题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?（）AIt routes all traffic that is addresses to the destination network to the interface indicates in the routing table.BIt sends a copy of its neighbor table to all adjacent routers.CIt sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.DIt broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
单选题You have just configured a static default route on router TK1. What is the purpose of a default route?（）AIt is a route to be used when the routing protocol fails.BIt is a route configured by an ISP that sends traffic into a corporate network.CIt is a route used when a packet is destined for a remote network that is not listed in the routing table.DIt is a route manually configured for a specific remote network for which a routing protocol is not configured.EIt is used to send traffic to a stub network.
单选题Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a longer AS_Path Length, bigger MED, bigger Weight, and smaller Loca l PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）ARoute 1 is the best route.BRoute 2 is the best route.CThe routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers.DNeither route is considered best.
单选题A RIP router has an entry in the routing table for a specific network destination. It then gets updated with another entry for that same destination, but with a higher path cost (hop count) than the one already in the routing table. What will the router do in this situation?（）AIt will ignore the update and take no further action.BIt will add the update information to its routing table.CIt will replace the existing routing table entry with the update information.DIt will delete the existing routing table and will send out hello packets to rebuild the routing table.
多选题Which two statements are true about the command ip route 172.16.3.0 255.255.255.0 192.168.2.4? (Choose two.)（）AIt establishes a static route to the 172.16.3.0 network.BIt establishes a static route to the 192.168.2.0 network.CIt configures the router to send any traffic for an unknown destination to the 172.16.3.0 network.DIt configures the router to send any traffic for an unknown destination out the interface with the address 192.168.2.4.EIt uses the default administrative distance.FIt is a route that would be used last if other routes to the same destination exist.
单选题A router has two paths to reach another network in a different autonomous system. Neither route was generated by the local router and both routes have the same default weight an d local preference values. Which statement is true about how BGP would select the best path?（）ATo influence one route to be preferred, its default local preference value will be changed via the use of the command bgp default local - preference 50BTh e router will prefer the shortest autonomous system pathCIf the command bgp always - compare - med has been given, then the router will prefer the route with the highest MEDDThe router will prefer the route with the lower MED