A routing protocol is required that supports: 1)routing update authentication 2)an addressing scheme that conserves IP addresses 3)multiple vendors 4)a network with over 50 routers Which routing protocol fulfills these requirements（）。

A . A routing protocol is assigned to an interface and determines the method of packet delivery. B . A routed protocol is assigned to an interface and determines the method of packet delivery. C . A routing protocol determines the path of a packet through a network. D . A routed protocol determines the path of a packet through a network. E . A routing protocol operates at the transport layer of the OSI model. F . A routed protocol updates the routing table of a router.

A . On the CE router, PE neighbors must be configured in the VRF context on the CE router B . On PE routers, the CE IBGP neighbors are configured in the global BGP configuration C . On PE routers, the CE EBGP neighbors are configured in the VRF context D . A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbor

A . OSPF B . EIGRP C . IS-IS D . BGP

A . The neighboring router stops receiving ACK packets from this router B . The neighboring router starts receiving route updates from this router C . The neighboring router is too busy to answer the query （generally caused by high CPUutilization） D . The neighboring router is having memory problems and cannot allocate the memory to processthe query or build the reply packet

A . link bandwidth B . hop count C . link cost D . administrative distance E . link delay

A . Never use passive interfaces. B . Use NSSA areas from the core down. C . Use totally stub areas to stop type 3 LSAs. D . Use the lowest Ethernet interface IP address as the router ID. E . Tune OSPF timers to enable OSPF to achieve quicker convergence.

A . Provide common view of entire topology B . Exchange routing tables with neighbors. C . Calculates shortest path. D . Utilizes event triggered updates. E . Utilizes frequent periodic updates.

A .  OSPF B .  EIGRP C .  IS-IS D .  BGP

A . IS - IS is capable of supporting IPv4 and IPv6. B . IS - IS is only capable of supporting IPv4 and CLNS. C . IS - IS routers use ES - IS hellos (ESH) to establish and to maintain neighbor relationships. D . IS - IS routers run the Bellman - Ford algorithm against their LSDBs to pick the best paths. E . Level 1 routers learn about paths within the area of which they are a part. F . Level 2 routers learn about paths both within areas and between areas.

A . RIP is an example of distance vector routing protocols. B . Updates are periodic and include the entire routing table. C . Routing updates are sent only after topology changes D . The protocol can be useful in hub-and-spoke and hierarchical networks. E . Convergence is usually faster than with link state protocols F . Each router has its own view of the topology

A . The neighboring router stops receiving ACK packets from this router. B . The neighboring router starts receiving route updates from this router. C . The neighboring router is too busy to answer the query(generally caused by high CPU utilization). D . The neighboring router is having memory problems and cannot allocate the memory to process the query or build the reply packet.

A .  EIGRP can summarize per interface. B .  OSPF router databases remain independent. C .  When they are configured with stubs， EIGRP regularly floods the topology. D .  OSPF topology decisions are made independent of hierarchy or area.

A . An update packet with init flag set from a known， already established neighbor relationship was received by one of the routers. B . The counters were deleted. C . The ARP cache was removed. D . The IP EIGRP neighbor relationship was cleared manually.

A .  Never use passive interfaces. B .  Use NSSA areas from the core down. C .  Use totally stub areas to stop type 3 LSAs. D .  Use the lowest Ethernet interface IP address as the router ID. E .  Tune OSPF timers to enable OSPF to achieve quicker convergence

A . EIGRP can be used only as the PE-CE routing protocol if the PE and CE routers are in the same AS B . Other EIGRP AS routes are automatically advertised to the CE router and do not require a redistribution configuration command to be configured C . Unlike other routing protocols that are used between PE and CE routers, EIGRP supports backdoor links D . Configure of the VPN is only required on the PE router

A . Summarize data center subnets. B . Use passive interfaces to ensure appropriate adjacencies. C . Tune the EIGRP timers to enable EIGRP to achieve quicker convergence. D . Adjust the default bandwidth value to ensure proper bandwidth on all links. E . Advertise a default summary route into the data center core from the aggregation layer.

A . EIGRP B . RIP C . OSPF D . IS - IS

A . For the two vlans to communicate，a network statement for the trunk interface needs to be added to the OSPF configuration. B . For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration. C . Direct inter-vlan communication does not require OSPF D . OSPF cannot be used if router-on-a-stick is configured on the router

A . CIDR B . Split horizon C . Authentication D . Classless masking E . Hold-down timers F . Multicast routing updates G . Path Vectoring

A . RIP B . BGP C . IS - IS D . OSPF E . EIGRP

<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/3f045f77c2fdb845bea361bfaf30df1f.jpg' /> A.No dynamic interior routing protocol can summarize as shown B.Unless configured otherwise, EIGRP would automatically summa rize the prefixes as shown in the exhibit C.With this IP addressing scheme, EIGRP can be manually configured to summarize prefixes at the specified summarization points D.The IP address design lends itself to OSPF Each summarizing router would be an ABR, summarizing to the next area in the address hierarchy

A．distance-vector B．link-state C．flow-based D．selective flooding

A.RIPv1 B.RIPv2 C.EIGRP D.OSPF