Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 221:

  What are three factors a network administrator must consider before implementing Netflow in the network? (Choose three.)

  A. CPU utilization
  B. where Netflow data will be sent
  C. number of devices exporting Netflow data
  D. port availability
  E. SNMP version
  F. WAN encapsulation
  A. CPU utilization
  B. where Netflow data will be sent
  C. number of devices exporting Netflow data

  ---

  NetFlow has a reputation for increasing CPU utilization on your network devices. Cisco's performance testing seems to indicate that newer hardware can accommodate this load pretty well, but you will still want to check it out before you turn on the feature. Some symptoms of high CPU utilization are very large jitter and increased delay. Services running on the device may also be affected. Another thing to keep in mind is the amount of data you're going to be sending across the network. Depending on how much traffic you have and how you configure it, the traffic can be substantial. For example, you may not want to send NetFlow data from a datacenter switch to a NetFlow collector on the other side of a small WAN circuit. Also bear in mind that the flows from aggregating large numbers of devices can add up.

  Reference: http://searchenterprisewan.techtarget.com/tip/How-the-NetFlow-protocol-monitors-your-WAN

• Question 222:

  Which three are valid modes for a switch port used as a VLAN trunk? (Choose three.)

  A. transparent
  B. auto
  C. on
  D. desirable
  E. blocking
  F. forwarding
  B. auto
  C. on
  D. desirable

  ---

  These are the different types of trunk modes:

  ON: This mode puts the port into permanent trunk mode and negotiates to convert the link into a trunk link. The port becomes a trunk port even if the adjacent port does not agree to the change.

  

  OFF: This mode puts the port into permanent non-trunk mode and negotiates to convert the link into a non-trunk link. The port becomes a non-trunk port even if the adjacent port does not agree to the change.

  

  Desirable: This mode causes the port to actively attempt to convert the link into a trunk link. The port becomes a trunk port if the adjacent port is set to on, desirable, or auto mode.

  

  Auto: This mode enables the port to convert the link into a trunk link. The port becomes a trunk port if the adjacent port is set to on or desirable mode. This is the default mode for Fast and Gigabit Ethernet ports.

  

  Nonegotiate: This mode puts the port into permanent trunk mode, but does not allow the port to generate Dynamic Trunking Protocol (DTP) frames. The adjacent port must be configured manually as a trunk port to establish a trunk link.

  

• Question 223:

  Which of the following statements describe the network shown in the graphic? (Choose two.)

  

  A. There are two broadcast domains in the network.
  B. There are four broadcast domains in the network.
  C. There are six broadcast domains in the network.
  D. There are four collision domains in the network.
  E. There are five collision domains in the network.
  F. There are seven collision domains in the network.
  A. There are two broadcast domains in the network.
  F. There are seven collision domains in the network.

  ---

  Only router can break up broadcast domains so in the exhibit there are 2 broadcast domains: from e0 interface to the left is a broadcast domain and from e1 interface to the right is another broadcast domain ->. Both router and switch can break up collision domains so there is only 1 collision domain on the left of the router (because hub doesn't break up collision domain) and there are 6 collision domains on the right of the router (1 collision domain from e1 interface to the switch + 5 collision domains for 5 PCs in Production) ->.

• Question 224:

  Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?

  A. 0.0.0.240
  B. 255.255.255.252
  C. 255.255.255.0
  D. 255.255.255.224
  E. 255.255.255.240
  D. 255.255.255.224

  ---

  For a class C network, a mask of 255.255.255.224 will allow for up to 8 networks with 32 IP addresses each (30 usable).

• Question 225:

  Which two tasks does the Dynamic Host Configuration Protocol perform? (Choose two.)

  A. Set the IP gateway to be used by the network.
  B. Perform host discovery used DHCPDISCOVER message.
  C. Configure IP address parameters from DHCP server to a host.
  D. Provide an easy management of layer 3 devices.
  E. Monitor IP performance using the DHCP server.
  F. Assign and renew IP address from the default pool.
  C. Configure IP address parameters from DHCP server to a host.
  F. Assign and renew IP address from the default pool.

  ---

  The Dynamic Host Configuration Protocol (DHCP) is a network protocol used to configure devices that are connected to a network (known as hosts) so they can communicate on that network using the Internet Protocol (IP). It involves clients and a server operating in a client-server model. DHCP servers assigns IP addresses from a pool of addresses and also assigns other parameters such as DNS and default gateways to hosts.

• Question 226:

  What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?

  A. SNMP
  B. Netflow
  C. WCCP
  D. IP SLA
  B. Netflow

  ---

  Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools.

  Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-netflow/prod_white_paper0900aecd80406232.html

• Question 227:

  Refer to the exhibit.

  

  A network technician is asked to design a small network with redundancy. The exhibit represents this design, with all hosts configured in the same VLAN. What conclusions can be made about this design?

  A. This design will function as intended.
  B. Spanning-tree will need to be used.
  C. The router will not accept the addressing scheme.
  D. The connection between switches should be a trunk.
  E. The router interfaces must be encapsulated with the 802.1Q protocol.
  C. The router will not accept the addressing scheme.

  ---

  Each interface on a router must be in a different network. If two interfaces are in the same network, the router will not accept it and show error when the administrator assigns it.

• Question 228:

  Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

  A. hop count
  B. administrative distance
  C. link bandwidth
  D. link delay
  E. link cost
  B. administrative distance

  ---

  By default the administrative distance of a static route is 1, meaning it will be preferred over all dynamic routing protocols. If you want to have the dynamic routing protocol used and have the static route be used only as a backup, you need to increase the AD of the static route so that it is higher than the dynamic routing protocol.

• Question 229:

  Syslog was configured with a level 3 trap. Which 3 types of logs would be generated (choose four)

  A. Emergencies
  B. Alerts
  C. Critical
  D. Errors
  E. Warnings
  A. Emergencies
  B. Alerts
  C. Critical
  D. Errors

  ---

  The Message Logging is divided into 8 levels as listed below:

  Level Keyword Description 0 emergencies System is unusable 1 alerts Immediate action is needed 2 critical Critical conditions exist 3 errors Error conditions exist 4 warnings Warning conditions exist 5 notification Normal, but significant, conditions exist 6 informational Informational messages 7 debugging Debugging messages

  The highest level is level 0 (emergencies). The lowest level is level 7. If you specify a level with the "logging console level" command, that level and all the higher levels will be displayed. For example, by using the "logging console warnings" command, all the logging of emergencies, alerts, critical, errors, warnings will be displayed.

• Question 230:

  Which two of these statements are true of IPv6 address representation? (Choose two.)

  A. There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast.
  B. A single interface may be assigned multiple IPv6 addresses of any type.
  C. Every IPv6 interface contains at least one loopback address.
  D. The first 64 bits represent the dynamically created interface ID.
  E. Leading zeros in an IPv6 16 bit hexadecimal field are mandatory.
  B. A single interface may be assigned multiple IPv6 addresses of any type.
  C. Every IPv6 interface contains at least one loopback address.

  ---

  A single interface may be assigned multiple addresses of any type (unicast, anycast, multicast).

  

  Every IPv6-enabled interface must contain at least one loopback and one link-local address.

  

  Optionally, every interface can have multiple unique local and global addresses.

  

  Reference: IPv6 Addressing at a Glance ?Cisco PDF