640-875 - Building Cisco Service Provider Next-Generation Networks, Part 1
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Which two statements about transparent bridging operations are true? (Choose two.)
A bridge operates at the data link layer.
A bridge sends unknown unicast frames out on all ports except the incoming port.
Which three statements about Cisco Discovery Protocol operations on a Cisco ME3400 switch are true? (Choose three.)
Cisco Discovery Protocol is enabled by default on NNI ports.
Cisco Discovery Protocol is disabled by default on ENI ports.
Cisco Discovery Protocol is not supported on UNI ports.
With a distance vector routing protocol like RIPv1, when is a route in the routing table placed in the "possibly down" state?
when a router receives an update from its neighbor router indicating that a previously accessible network is now inaccessible
Given the CIDR address range of 184.108.40.206 to 220.127.116.11, what is the CIDR block?
Generally, which way is the fastest to open S3 and S4 service requests to the Cisco TAC?
Use the online TAC Service Request Tool.
What are the three RFC 1918 IPv4 private address ranges? (Choose three.)
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Which statement about STP operations is true?
One designated port is defined per segment.
Which two statements about classful or classless routing protocol operations are true? (Choose two.)
Classful routing protocols do not send subnet mask information with their routing updates.
Classful routing protocols do not support discontiguous subnets.
Which component is integrated into the Cisco IPoDWDM interfaces?
Which Layer 2 WAN protocol uses DLCI as the virtual circuit identifier?
When EIGRP is enabled on Cisco IOS XR, which EIGRP feature is on by default?
What does a transparent LAN switch use to build its CAM table?
analysis of the source MAC address of incoming frames on the bridge ports
Currently, a Cisco IOS XR router is configured to send IP SLA probes to a network management station that is acting as the IP SLA target device. How can IP SLA measurement accuracy be improved and also provide additional statistics?
Configure another Cisco router as the target and enable that other Cisco router for IP SLA Responder operations.
Which three statements correctly describe DSL-based Internet services for residential users? (Choose three.)
Most residential deployments use PPPoE encapsulation where the end user PC or the DSL CPE will require a PPP username and password configuration.
The most commonly installed DSL variant for residential deployments is ADSL.
At the DSL service provider location, a DSLAM is used to terminate and then aggregate the DSL connections over an ATM network
On Cisco IOS Switches, which port security violation mode results in frames from non-allowed MAC address being dropped, log message created, and SNMP trap sent?
Which Cisco IOS CLI command is used to verify the speed and duplex settings on the Fa0/1 port on a Cisco switch?
show interfaces fa0/1
Which two statements about NetFlow support on Cisco IOS XR are true? (Choose two.)
Cisco IOS XR supports NetFlow version 9 export format only.
NetFlow version 9 is a flexible and extensible means to carry NetFlow records from a network node to a collector.
What is the SDH equivalent of the SONET STS-12 framing format?
Which two statements about these partial Cisco IOS/IOS-XE configurations are true? (Choose two.)
10.1.1.2 is the inside local address.
This is an example of static one-to-one Network Address Translation.
Which SNMPv2/SNMPv3 operation is not supported in Cisco IOS XR software?
Which two statements about Packet over SONET are true? (Choose two.)
The Layer 2 frame is encapsulated into a generic HDLC header (not Cisco proprietary HDLC) and placed into the appropriate SONET Payload Envelope.
The Cisco POS interface supports Cisco HDLC and PPP encapsulation.
Which statement about 10/40/100 GigabitEthernet interface configuration on Cisco IOS XR is true?
The configuration supports only full-duplex operation.
Which IPv6 feature replaced and enhanced the IPv4 ARP functions?
router solicitation and router advertisement
With IPv6, for which purpose are router solicitation and router advertisement used?
router and prefix discovery
What is the default spanning-tree mode of an NNI port on a Cisco ME3400 switch?
per-vlan rapid spanning tree (rapid-pvst)
Which Cisco IOS XR command displays information about statically configured routes and their corresponding interface or next-hop?
show route static
Which two statements about Cisco IOS XE operations are true? (Choose two.)
The copy run start command makes the configuration changes persistent across reboots.
The erase start command followed by the reboot command brings up the router without any configurations.
According to this show output, what are sticky MAC addresses?
dynamically learned MAC addresses on the port that are stored in the running configuration
Which Cisco IOS XR command is involved in enabling remote access?
RP/0/RSP0/CPU0:PE1(config)# telnet ipv4 server max-servers 20
What is the result of using the Cisco IOS copy tftp: run command?
The configuration stored in the TFTP server is merged with the running configuration on the Cisco IOS device.
When two or more different routes exist to the same destination that have been learned from two different routing protocols, what does a router use to determine the best route?
Which statement about a root bridge in an STP domain is true?
It has the lowest bridge ID in the STP domain.
Which layer(s) of the TCP/IP model operates end-to-end (Host A to Host B)?
transport and application layers
Given these four Class B networks: 18.104.22.168, 22.214.171.124, 126.96.36.199, 188.8.131.52, what is the supernet (CIDR) address that summarizes these four Class B networks?
Which configuration is necessary to support this output?
ip address 192.168.3.1 255.255.255.0 ip nat inside ! interface Ethernet1 ip address 192.168.4.1 255.255.255.0 ip nat inside ! interface Serial0 ip address 172.17.38.1 255.255.255.0 ip nat outside ! ip nat inside source list 1 interface Serial0 overload ! access-list 1 permit 192.168.3.0 0.0.0.255 access-list 1 permit 192.168.4.0 0.0.0.255