Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 321:

  What are three advantages of VLANs? (Choose three.)

  A. VLANs establish broadcast domains in switched networks.
  B. VLANs utilize packet filtering to enhance network security.
  C. VLANs provide a method of conserving IP addresses in large networks.
  D. VLANs provide a low-latency internetworking alternative to routed networks.
  E. VLANs allow access to network services based on department, not physical location.
  F. VLANs can greatly simplify adding, moving, or changing hosts on the network.
  A. VLANs establish broadcast domains in switched networks.
  E. VLANs allow access to network services based on department, not physical location.
  F. VLANs can greatly simplify adding, moving, or changing hosts on the network.

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  VLAN technology is often used in practice, because it can better control layer2 broadcast to improve network security. This makes network more flexible and scalable. Packet filtering is a function of firewall instead of VLAN.

• Question 322:

  DRAG DROP Routing has been configured on the local router with these commands: Local(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.1 Local(config)# ip route 10.1.0.0 255.255.255.0 192.168.2.2 Local(config)# ip route 10.1.0.0 255.255.0.0 192.168.3.3 Drag each destination IP address on the left to its correct next hop address on the right.

  Select and Place:

  

  

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  If we have many entries matching for next hop ip address then the router will choose the one with most specific path to send the packet. This is called the “longest match” rule, the route with the most bits in the mask set to “1″ will be chosen to route packet

• Question 323:

  The network administrator cannot connect to Switch1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router.

  

  Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on Switch1 to correct this problem?

  A. Switch1(config)# line con0 Switch1(config-line)# password cisco Switch1(config-line)#login
  B. Switch1(config)# interface fa0/1 Switch1(config-if)# ip address 192.168.24.3 255.255.255.0
  C. Switch1(config)# ip default-gateway 192.168.24.1
  D. Switch1(config)# interface fa0/1 Switch1(config-if)# duplex full Switch1(config-if)# speed 100
  E. Switch1(config)# interface fa0/1 Switch1(config-if)# switchport mode trunk
  C. Switch1(config)# ip default-gateway 192.168.24.1

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  Since we know hosts can reach the router through the switch, we know that connectivity, duplex. Speed, etc. are good. However, for the switch itself to reach networks outside the local one, the ip default-gateway command must be used.

• Question 324:

  What command sequence will configure a router to run OSPF and add network 10.1.1.0 /24 to area 0?

  A. router ospf area 0 network 10.1.1.0 255.255.255.0 area 0
  B. router ospf network 10.1.1.0 0.0.0.255
  C. router ospf 1 network 10.1.1.0 0.0.0.255 area 0
  D. router ospf area 0 network 10.1.1.0 0.0.0.255 area 0
  E. router ospf network 10.1.1.0 255.255.255.0 area 0
  F. router ospf 1 network 10.1.1.0 0.0.0.255
  C. router ospf 1 network 10.1.1.0 0.0.0.255 area 0

  ---

  Enabling OSPF SUMMARY STEPS

  1.

  enable

  2.

  configure terminal

  3.

  router ospf process-id

  4.

  network ip-address wildcard-mask area area-id

  5.

  end DETAILED STEPS

  

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/12-4t/iro-12-4t-book/iro-cfg.html#GUID-588D1301-F63C-4DAC-BF1C-C3735EB13673

• Question 325:

  Refer to the exhibit.

  

  Which of these statements correctly describes the state of the switch once the boot process has been completed?

  A. As FastEthernet0/12 will be the last to come up, it will be blocked by STP.
  B. Remote access management of this switch will not be possible without configuration change.
  C. More VLANs will need to be created for this switch.
  D. The switch will need a different IOS code in order to support VLANs and STP.
  B. Remote access management of this switch will not be possible without configuration change.

  ---

  Notice the line, which says "Interface VLAN1, changed state to administratively down". This shows that VLAN1 is shut down. Hence remote management of this switch is not possible unless VLAN1 is brought back up. Since VLAN1 is the only interface shown in the output, you have to assume that no other VLAN interface has been configured with an IP Address.

  Incorrect Answers:

  A. Whether a port is blocked or not by STP does not depend on the order in which the port became active.

  C. Whether or not more VLANs are needed is not clear form the output.

  D. 12.2(25)SEE2 LANBASE IOS code is capable of handling VLANs and STP. In general any 12.2 code can handle these features.

• Question 326:

  Refer to the exhibit.

  

  What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?

  A. The Serial0/0 interface is passing traffic.
  B. The DLCI 100 was dynamically allocated by the router.
  C. The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server.
  D. The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud.
  E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP.
  E. The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP.

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  Inverse Address Resolution Protocol (Inverse ARP) was developed to provide a mechanism for dynamic DLCI to Layer 3 address maps. Inverse ARP works much the same way Address Resolution Protocol (ARP) works on a LAN. However, with ARP, the device knows the Layer 3 IP address and needs to know the remote data link MAC address. With Inverse ARP, the router knows the Layer 2 address which is the DLCI, but needs to know the remote Layer 3 IP address. When using dynamic address mapping, Inverse ARP requests a next-hop protocol address for each active PVC. Once the requesting router receives an Inverse ARP response, it updates its DLCI-to-Layer 3 address mapping table. Dynamic address mapping is enabled by default for all protocols enabled on a physical interface. If the Frame Relay environment supports LMI autosensing and Inverse ARP, dynamic address mapping takes place automatically. Therefore, no static address mapping is required.

• Question 327:

  What are three approaches that are used when migrating from an IPv4 addressing scheme to an IPv6 scheme. (Choose three.)

  A. enable dual-stack routing
  B. configure IPv6 directly
  C. configure IPv4 tunnels between IPv6 islands
  D. use proxying and translation to translate IPv6 packets into IPv4 packets
  E. statically map IPv4 addresses to IPv6 addresses
  F. use DHCPv6 to map IPv4 addresses to IPv6 addresses
  A. enable dual-stack routing
  C. configure IPv4 tunnels between IPv6 islands
  D. use proxying and translation to translate IPv6 packets into IPv4 packets

  ---

  Several methods are used terms of migration including tunneling, translators, and dual stack. Tunnels are used to carry one protocol inside another, while translators simply translate IPv6 packets into IPv4 packets. Dual stack uses a combination of both native IPv4 and IPv6. With dual stack, devices are able to run IPv4 and IPv6 together and if IPv6 communication is possible that is the preferred protocol. Hosts can simultaneously reach IPv4 and IPv6 content.

• Question 328:

  Which two are advantages of static routing when compared to dynamic routing? (Choose two.)

  A. Configuration complexity decreases as network size increases.
  B. Security increases because only the network administrator may change the routing table.
  C. Route summarization is computed automatically by the router.
  D. Routing tables adapt automatically to topology changes.
  E. An efficient algorithm is used to build routing tables, using automatic updates.
  F. Routing updates are automatically sent to neighbors.
  G. Routing traffic load is reduced when used in stub network links.
  B. Security increases because only the network administrator may change the routing table.
  G. Routing traffic load is reduced when used in stub network links.

  ---

  Since static routing is a manual process, it can be argued that it is more secure (and more prone to human errors) since the network administrator will need to make changes to the routing table directly. Also, in stub networks where there is only a single uplink connection, the load is reduced as stub routers just need a single static default route, instead of many routes that all have the same next hop IP address.

• Question 329:

  Refer to the exhibit.

  

  What is the most appropriate summarization for these routes?

  A. 10.0.0.0 /21
  B. 10.0.0.0 /22
  C. 10.0.0.0 /23
  D. 10.0.0.0 /24
  B. 10.0.0.0 /22

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  The 10.0.0.0/22 subnet mask will include the 10.0.0.0, 10.0.1.0, 10.0.2.0, and 10.0.3.0 networks, and only those four networks.

• Question 330:

  Which command shows your active Telnet connections?

  A. show cdp neigbors
  B. show session
  C. show users
  D. show vty logins
  B. show session

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  The "show users" shows telnet/ssh connections to your router while "show sessions" shows telnet/ssh connections from your router (to other devices). The question asks about "your active Telnet connections", meaning connections from your router so the answer should be A.