Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 141:

  Which router IOS commands can be used to troubleshoot LAN connectivity problems? (Choose three.)

  A. ping
  B. tracert
  C. ipconfig
  D. show ip route
  E. winipcfg
  F. show interfaces
  A. ping
  D. show ip route
  F. show interfaces

  ---

  Ping, show ip route, and show interfaces are all valid troubleshooting IOS commands. Tracert, ipconfig, and winipcfg are PC commands, not IOS.

• Question 142:

  Which item represents the standard IP ACL?

  A. access-list 110 permit ip any any
  B. access-list 50 deny 192.168.1.1 0.0.0.255
  C. access list 101 deny tcp any host 192.168.1.1
  D. access-list 2500 deny tcp any host 192.168.1.1 eq 22
  B. access-list 50 deny 192.168.1.1 0.0.0.255

  ---

  The standard access lists are ranged from 1 to 99 and from 1300 to 1999 so only access list 50 is a standard access list.

• Question 143:

  Which command can you use to manually assign a static IPv6 address to a router interface?

  A. ipv6 autoconfig 2001:db8:2222:7272::72/64
  B. ipv6 address 2001:db8:2222:7272::72/64
  C. ipv6 address PREFIX_1 ::1/64
  D. ipv6 autoconfig
  B. ipv6 address 2001:db8:2222:7272::72/64

  ---

  To assign an IPv6 address to an interface, use the "ipv6 address" command and specify the IP address you wish to use.

• Question 144:

  Refer to the exhibit.

  

  Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?

  A. 10.1.1.2
  B. 10.154.154.1
  C. 172.16.5.1
  D. 192.168.5.3
  C. 172.16.5.1

  ---

  The highest IP address of all loopback interfaces will be chosen -> Loopback 0 will be chosen as the router ID.

• Question 145:

  Refer to the exhibit.

  

  Which switch provides the spanning-tree designated port role for the network segment that services the printers?

  A. Switch1
  B. Switch2
  C. Switch3
  D. Switch4
  C. Switch3

  ---

  Printers are connected by hubs. Decide the switch that provides the spanning-tree designated port role between Switch3 and Switch4. They have the same priority 32768. Compare their MAC addresses. Switch3 with a smaller MAC address will provide a designated port for printers.

• Question 146:

  What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?

  A. path cost
  B. lowest port MAC address
  C. VTP revision number
  D. highest port priority number
  E. port priority number and MAC address
  A. path cost

  ---

  The path cost to the root bridge is the most important value to determine which port will become the root port on each non-root switch. In particular, the port with lowest cost to the root bridge will become root port (on non-root switch).

• Question 147:

  Refer to the exhibit.

  

  When running OSPF, what would cause router A not to form an adjacency with router B?

  A. The loopback addresses are on different subnets.
  B. The values of the dead timers on the routers are different.
  C. Route summarization is enabled on both routers.
  D. The process identifier on router A is different than the process identifier on router B.
  B. The values of the dead timers on the routers are different.

  ---

  To form an adjacency (become neighbor), router A and B must have the same Hello interval, Dead interval and AREA numbers

• Question 148:

  Refer to the exhibit.

  

  What is the effect of the given configuration?

  A. It configures an inactive switch virtual interface.
  B. It configures an active management interface.
  C. It configures the native VLAN.
  D. It configures the default VLAN.
  A. It configures an inactive switch virtual interface.

• Question 149:

  DRAG DROP

  Drag each category on the left to its corresponding router output line on the right. Each router output line is the result of a show ip interface command. Not all categories are used.

  Select and Place:

  

  

  ---

  A simple way to find out which layer is having problem is to remember this rule: “the first statement is for Layer 1, the last statement is for Layer 2 and if Layer 1 is down then surely Layer 2 will be down too”, so you have to check Layer 1

  before checking Layer 2. For example, from the output “Serial0/1 is up, line protocol is down” we know that it is a layer 2 problem because the first statement (Serial0/1 is up) is good while the last statement (line protocol is down) is bad. For

  the statement “Serial0/1 is down, line protocol is down”, both layers are down so the problem belongs to Layer 1.

  There is only one special case with the statement “…. is administrator down, line protocol is down”. In this case, we know that the port is currently disabled and shut down by the administrators.

• Question 150:

  Which of the following describes the roles of devices in a WAN? (Choose three.)

  A. A CSU/DSU terminates a digital local loop.
  B. A modem terminates a digital local loop.
  C. A CSU/DSU terminates an analog local loop.
  D. A modem terminates an analog local loop.
  E. A router is commonly considered a DTE device.
  F. A router is commonly considered a DCE device.
  A. A CSU/DSU terminates a digital local loop.
  D. A modem terminates an analog local loop.
  E. A router is commonly considered a DTE device.

  ---

  The idea behind a WAN is to be able to connect two DTE networks together through a DCE network. The network's DCE device (includes CSU/DSU) provides clocking to the DTE-connected interface (the router's serial interface).

  

  A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device. A CSU/DSU is used between two digital lines For more explanation of answer D, in telephony the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network. Therefore a modem terminates an analog local loop is correct.