Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 211:

  Which three are characteristics of an IPv6 anycast address? (Choose three.)

  A. one-to-many communication model
  B. one-to-nearest communication model
  C. any-to-many communication model
  D. a unique IPv6 address for each device in the group
  E. the same address for multiple devices in the group
  F. delivery of packets to the group interface that is closest to the sending device
  B. one-to-nearest communication model
  E. the same address for multiple devices in the group
  F. delivery of packets to the group interface that is closest to the sending device

  ---

  A new address type made specifically for IPv6 is called the Anycast Address. These IPv6 addresses are global addresses, these addresses can be assigned to more than one interface unlike an IPv6 unicast address. Anycast is designed to

  send a packet to the nearest interface that is a part of that anycast group.

  The sender creates a packet and forwards the packet to the anycast address as the destination address which goes to the nearest router. The nearest router or interface is found by using the metric of a routing protocol currently running on

  the network. However in a LAN setting the nearest interface is found depending on the order the neighbors were learned. The anycast packet in a LAN setting forwards the packet to the neighbor it learned about first.

• Question 212:

  Refer to the exhibit.

  

  What can be determined about the router from the console output?

  A. No configuration file was found in NVRAM.
  B. No configuration file was found in flash.
  C. No configuration file was found in the PCMCIA card.
  D. Configuration file is normal and will load in 15 seconds.
  A. No configuration file was found in NVRAM.

  ---

  When no startup configuration file is found in NVRAM, the System Configuration Dialog will appear to ask if we want to enter the initial configuration dialog or not.

• Question 213:

  Refer to the exhibit.

  

  Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

  A. 252
  B. 253
  C. 254
  D. 255
  B. 253

  ---

  From the CCNA ICND2 Exam book: "Routers decrement the TTL by 1 every time they forward a packet; if a router decrements the TTL to 0, it throws away the packet. This prevents packets from rotating forever." I want to make it clear that before the router forwards a packet, the TTL is still remain the same. For example in the topology above, pings to S0/1 and S0/0 of Router 2 have the same TTL. The picture below shows TTL values for each interface of each router and for Host B. Notice that Host A initializes ICMP packet with a TTL of 255:

  

• Question 214:

  Refer to the exhibit.

  

  The output that is shown is generated at a switch. Which three statements are true? (Choose three.)

  A. All ports will be in a state of discarding, learning, or forwarding.
  B. Thirty VLANs have been configured on this switch.
  C. The bridge priority is lower than the default value for spanning tree.
  D. All interfaces that are shown are on shared media.
  E. All designated ports are in a forwarding state.
  F. This switch must be the root bridge for all VLANs on this switch.
  A. All ports will be in a state of discarding, learning, or forwarding.
  C. The bridge priority is lower than the default value for spanning tree.
  E. All designated ports are in a forwarding state.

  ---

  From the output, we see that all ports are in designated role (forwarding state).

  The command "show spanning-tree vlan 30 only shows us information about VLAN 30. We don't know how many VLAN exists in this switch ->.

  The bridge priority of this switch is 24606 which is lower than the default value bridge priority 32768.

  All three interfaces on this switch have the connection type "p2p", which means Point-to-point environment ?not a shared media.

  The only thing we can specify is this switch is the root bridge for VLAN 3o but we cannot guarantee it is also the root bridge for other VLANs.

• Question 215:

  What is the purpose of the POST operation on a router?

  A. determine whether additional hardware has been added
  B. locate an IOS image for booting
  C. enable a TFTP server
  D. set the configuration register
  A. determine whether additional hardware has been added

• Question 216:

  Refer to the exhibit.

  

  The two exhibited devices are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252. Given the output that is shown, what three statements are true of these devices? (Choose three.)

  A. The Manchester serial address is 10.1.1.1.
  B. The Manchester serial address is 10.1.1.2.
  C. The London router is a Cisco 2610.
  D. The Manchester router is a Cisco 2610.
  E. The CDP information was received on port Serial0/0 of the Manchester router.
  F. The CDP information was sent by port Serial0/0 of the London router.
  A. The Manchester serial address is 10.1.1.1.
  C. The London router is a Cisco 2610.
  E. The CDP information was received on port Serial0/0 of the Manchester router.

  ---

  From the output, we learn that the IP address of the neighbor router is 10.1.1.2 and the question stated that the subnet mask of the network between two routers is 255.255.255.252. Therefore there are only 2 available hosts in this network

  (22 ?2 = 2). So we can deduce the ip address (of the serial interface) of Manchester router is 10.1.1.1 >;.

  The platform of the neighbor router is cisco 2610, as shown in the output ->.

  Maybe the most difficult choice of this question is the answer E or F. Please notice that "Interface" refers to the local port on the local router, in this case it is the port of Manchester router, and "Port ID (outgoing port)" refers to the port on the

  neighbor router.

• Question 217:

  Refer to the exhibit.

  

  All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)

  A. Network A - 172.16.3.48/26
  B. Network A - 172.16.3.128/25
  C. Network A - 172.16.3.192/26
  D. Link A - 172.16.3.0/30
  E. Link A - 172.16.3.40/30
  F. Link A - 172.16.3.112/30
  B. Network A - 172.16.3.128/25
  D. Link A - 172.16.3.0/30

  ---

  Only a /30 is needed for the point to point link and sine the use of the ip subnet-zero was used, 172.16.3.0/30 is valid. Also, a /25 is required for 120 hosts and again 172.16.3.128/25 is the best, valid option.

• Question 218:

  A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?

  A. application
  B. presentation
  C. session
  D. transport
  E. internet
  F. data link
  A. application

  ---

  FTP belongs to Application layer and it is also the highest layer of the OSI model.

• Question 219:

  What are two enhancements that OSPFv3 supports over OSPFv2? (Choose two.)

  A. It requires the use of ARP.
  B. It can support multiple IPv6 subnets on a single link.
  C. It supports up to 2 instances of OSPFv3 over a common link.
  D. It routes over links rather than over networks.
  B. It can support multiple IPv6 subnets on a single link.
  D. It routes over links rather than over networks.

• Question 220:

  Which statements describe the routing protocol OSPF? (Choose three.)

  A. It supports VLSM.
  B. It is used to route between autonomous systems.
  C. It confines network instability to one area of the network.
  D. It increases routing overhead on the network.
  E. It allows extensive control of routing updates.
  F. It is simpler to configure than RIP v2.
  A. It supports VLSM.
  C. It confines network instability to one area of the network.
  E. It allows extensive control of routing updates.

  ---

  The OSPF protocol is based on link-state technology, which is a departure from the Bellman-Ford vector based algorithms used in traditional Internet routing protocols such as RIP. OSPF has introduced new concepts such as authentication

  of routing updates, Variable Length Subnet Masks (VLSM), route summarization, and so forth.

  OSPF uses flooding to exchange link-state updates between routers. Any change in routing information is flooded to all routers in the network. Areas are introduced to put a boundary on the explosion of link-state updates. Flooding and

  calculation of the Dijkstra algorithm on a router is limited to changes within an area.