In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）

A .  GLBP and VRRP allow for MD5 authentication， whereas HSRP does not. B .  HSRP allows for multiple upstream active links being simultaneously used， whereas GLBP  does not. C .  GLBP allows for router load balancing of traffic from a network segment without the different  host IP configurations required to achieve the same results with HSRP. D .  Unlike HSRP and VRRP， GLBP allows automatic selection and simultaneous use of multiple  available gateways. E .  GLBP allows for router load balancing of traffic from a network segment by utilizing the creation  of multiple standby groups.

A . any route advertisements it has received B . prefixes for the link C . keepalive timers D . IPv6 address for the host E . request for the local host IP address F . lifetime of the prefix

A . admission control B . DSCP classification C . monitoring D . marking E . scheduling

A . the IP address of the first Fast Ethernet interface B . the IP address of the console management interface C . the highest IP address among its active interfaces D . the lowest IP address among its active interfaces E . the priority value until a loopback interface is configured

A . Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload. B . R2 will continue to forward traffic to R1， but R1 will drop the traffic because its neighbor adjacency with R2 has failed. C . R2 will continue forwarding traffic to and through R1， but R1 will drop this traffic because it is not capable of maintaining its forwarding state. D . All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.

A .  Load sharing with HSRP is achieved by creating multiple subinterfaces on the HSRP routers.   B .  Routers configured for HSRP can belong to multiple groups and multiple VLANs. C .  Load sharing with HSRP is achieved by creating HSRP groups on the HSRP routers. D .  All routers configured for HSRP load balancing must be configured with the same priority.   E .  Routers configured for HSRP must belong to only one group per HSRP interface.

A . Multicast Source Discovery Protocol mesh-groups must be configured between the two anycast RPs. B . The RPs must be within the same IGP domain. C . Multicast Source Discovery Protocol must be configured between the two anycast RPs. D . The two anycast RPs must be IBGP peers.

A . Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports. B . Calls to the PSTN can be made via FXS or T1/E1 trunk ports. C . Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports. D . Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.

A . ip pim rp-address B . ip pim ssm C . ip pim sparse-mode D . ip pim passive

A . packet switching B . access layer security C . path selection D . VLAN membership assignment E . bridging between LAN segments F . microsegmentation of broadcast domai

A . Filtering can occur based on Layer 3 information. B . Broadcasts are eliminated. C . Routers generally cost less than switches. D . Broadcasts are not forwarded across the router. E . Adding a router to the network decreases latency.

A . Some query or reply packets are lost between the routers B . The neighboring router starts receiving route updates from this router C . A failure causes traffic on a link between two neighboring routers to flow in only one direction（unidirectional link） D . The neighboring router stops receiving ACK packets from this router

A . Filtering can occur based on Layer 3 information. B . Broadcasts are eliminated. C . Routers generally cost less than switches. D . Broadcasts are not forwarded across the router. E . Adding a router to the network decreases latency.

A .  Mitigation and Response B .  Fibre Channel over Ethernet C .  IP communications D .  Data Center Virtualization E .  VPN security

A . packet switching B . access layer security C . path selection D . VLAN membership assignment E . bridging between LAN segments F . microsegmentation of broadcast domai

A . TCP-based hello packets B . the impact of flapping links if timers are too low C . a shared single interface D . the ability to track serial interfaces E . UDP-based hello packet

A . sampling B . packetization C . quantization D . serializatio

A . Shared single interface B . IP Address C . TCP-based hello packets D . MAC addre

A .  Cisco Intrusion Prevention System B .  higher bandwidth C .  virtual private networks D .  access control lists E .  URL filtering

A . IP PIM RP-address B . IP PIM ssm C . IP PIM Sparse-mode D . IP PIM Passive

A .  Calls to the PSTN can be made via the use of FXO or T1/E1 trunk ports. B .  Calls to the PSTN can be made via FXS or T1/E1 trunk ports. C .  Analog and IP phones can be connected to the VoIP network via FXO or T1/E1 trunk ports. D .  Calls between analog phones that are attached to the FXS ports in a VoIP network can be completely processed by voice-enabled routers.

A . Some quer y or reply packets are lost between the routers. B . The neighboring router starts receiving route updates from this router. C . A failure causes traffic on a link between two neighboring routers to flow in only one direction(unidirectional link). D . Th e neighboring router stops receiving ACK packets from this router.

A.host route B.default route C.customer network D.ISP’s routing domain