Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 251:

  Refer to the exhibit.

  

  A network administrator configures a new router and enters the copy startup-config running-config command on the router. The network administrator powers down the router and sets it up at a remote location. When the router starts, it enters the system configuration dialog as shown. What is the cause of the problem?

  A. The network administrator failed to save the configuration.
  B. The configuration register is set to 0x2100.
  C. The boot system flash command is missing from the configuration.
  D. The configuration register is set to 0x2102.
  E. The router is configured with the boot system startup command.
  A. The network administrator failed to save the configuration.

  ---

  The "System Configuration Dialog" appears only when no startup configuration file is found. The network administrator has made a mistake because the command "copy startup-config running-config" will copy the startup config (which is

  empty) over the running config (which is configured by the administrator). So everything configured was deleted.

  Note: We can tell the router to ignore the start-up configuration on the next reload by setting the register to 0?142. This will make the "System Configuration Dialog" appear at the next reload.

• Question 252:

  DRAG DROP

  A user is unable to connect to the Internet. Based on the layered approach to troubleshooting and beginning with the lowest layer, drag each procedure on the left to its proper category on the right.

  Select and Place:

  

  

  ---

  The question asks us to “begin with the lowest layer” so we have to begin with Layer 1: verify physical connection; in this case an Ethernet cable connection. For your information, “verify Ethernet cable connection” means that we check if the

  type of connection (crossover, straight-through, rollover…) is correct, the RJ45 headers are plugged in, the signal on the cable is acceptable…

  Next we “verify NIC operation”. We do this by simply making a ping to the loopback interface 127.0.0.1. If it works then the NIC card (layer 1, 2) and TCP/IP stack (layer 3) are working properly.

  Verify IP configuration belongs to layer 3. For example, checking if the IP can be assignable for host, the PC's IP is in the same network with the gateway…

  Verifying the URL by typing in your browser some popular websites like google.com, microsoft.com to assure that the far end server is not down (it sometimes make we think we can't access to the Internet). We are using a URL so this step

  belongs to layer 7 of the OSI model.

• Question 253:

  When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?

  A. exstart state > loading state > exchange state > full state
  B. exstart state > exchange state > loading state > full state
  C. exstart state > full state > loading state > exchange state
  D. loading state > exchange state > full state > exstart state
  B. exstart state > exchange state > loading state > full state

  ---

  When OSPF adjacency is formed, a router goes through several state changes before it becomes fully adjacent with its neighbor. Those states are defined in the OSPF RFC 2328, section 10.1. The states are (in order) Down, Attempt, Init, 2Way, Exstart, Exchange, Loading, and Full.

  Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13685-13.html

• Question 254:

  Which technology can enable multiple VLANs to communicate with one another?

  A. inter-VLAN routing using a Layer 3 switch
  B. inter-VLAN routing using a Layer 2 switch
  C. intra-VLAN routing using router on a stick
  D. intra-VLAN routing using a Layer 3 switch
  A. inter-VLAN routing using a Layer 3 switch

• Question 255:

  Which two benefits are provided by creating VLANs? (Choose two.)

  A. added security
  B. dedicated bandwidth
  C. provides segmentation
  D. allows switches to route traffic between subinterfaces
  E. contains collisions
  A. added security
  C. provides segmentation

  ---

  A VLAN is a switched network that is logically segmented on an organizational basis, by functions, project teams, or applications rather than on a physical or geographical basis.

  Security:

  VLANs also improve security by isolating groups. High-security users can be grouped into a VLAN, possible on the same physical segment, and no users outside that VLAN can communicate with them.

  LAN Segmentation

  VLANs allow logical network topologies to overlay the physical switched infrastructure such that any arbitrary collection of LAN ports can be combined into an autonomous user group or community of interest. The technology logically

  segments the network into separate Layer 2 broadcast domains whereby packets are switched between ports designated to be within the same VLAN. By containing traffic originating on a particular LAN only to other LANs in the same VLAN,

  switched virtual networks avoid wasting bandwidth.

• Question 256:

  Refer to the exhibit.

  

  If the router Cisco returns the given output and has not had its router ID set manually, what value will OSPF use as its router ID?

  A. 192.168.1.1
  B. 172.16.1.1
  C. 1.1.1.1
  D. 2.2.2.2
  D. 2.2.2.2

  ---

  If a router-id is not configured manually in the OSPF routing process the router will automatically configure a router-id determined from the highest IP address of a logical interface (loopback interface) or the highest IP address of an active interface. If more than one loopback interfaces are configured, the router will compare the IP addresses of each of the interfaces and choose the highest IP address from the loopbacks.

• Question 257:

  Which port state is introduced by Rapid-PVST?

  A. learning
  B. listening
  C. discarding
  D. forwarding
  C. discarding

  ---

  PVST+ is based on IEEE802.1D Spanning Tree Protocol (STP). But PVST+ has only 3 port states (discarding, learning and forwarding) while STP has 5 port states (blocking, listening, learning, forwarding and disabled). So discarding is a new port state in PVST+.

• Question 258:

  Which standards-based First Hop Redundancy Protocol is a Cisco supported alternative to Hot Standby Router Protocol?

  A. VRRP
  B. GLBP
  C. TFTP
  D. DHCP
  A. VRRP

• Question 259:

  What are two requirements for an HSRP group? (Choose two.)

  A. exactly one active router
  B. one or more standby routers
  C. one or more backup virtual routers
  D. exactly one standby active router
  E. exactly one backup virtual router
  A. exactly one active router
  B. one or more standby routers

• Question 260:

  Refer to the exhibit.

  

  Why has this switch not been elected the root bridge for VLAN1?

  A. It has more than one interface that is connected to the root network segment.
  B. It is running RSTP while the elected root bridge is running 802.1d spanning tree.
  C. It has a higher MAC address than the elected root bridge.
  D. It has a higher bridge ID than the elected root bridge.
  D. It has a higher bridge ID than the elected root bridge.

  ---

  The root bridge is determined by the lowest bridge ID, and this switch has a bridge ID priority of 32768, which is higher than the roots priority of 20481.