Cisco 640-802 Online Practice Questions and Exam Preparation

Cisco 640-802 Online Questions & Answers

• Question 51:

  Refer to the exhibit.

  

  The technician wants to upload a new IOS in the router while keeping the existing IOS. What is the maximum size of an IOS file that could be loaded if the original IOS is also kept in flash?

  A. 3 MB
  B. 4 MB
  C. 5 MB
  D. 7 MB
  E. 8 MB
  B. 4 MB

  ---

  In this example, there are a total of 8 MB, but 3.8 are being used already, so another file as large as 4MB can be loaded in addition to the original file.

• Question 52:

  How many bits are contained in each field of an IPv6 address?

  A. 24
  B. 4
  C. 8
  D. 16
  D. 16

  ---

  An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:). An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334.

• Question 53:

  SIMULATION

  The following have already been configured on the router:

  The basic router configuration

  The appropriate interfaces have been configured for NAT inside and NAT outside.

  The appropriate static routes have also been configured (since the company will be a stub network, no routing protocol will be required)

  All passwords have been temporarily set to “cisco”.

  The task is to complete the NAT configuration using all IP addresses assigned by the ISP to provide Internet access for the hosts in the Weaver LAN. Functionality can be tested by clicking on the host provided for testing.

  Configuration information:

  router name – Weaver

  inside global addresses – 198.18.184.105 - 198.18.184.110/29

  inside local addresses - 192.168.100.17 – 192.168.100.30/28

  number of inside hosts – 14

  

  A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30.

  Correct Answer. Check the answer below
  Check the answer below

  ---

  The company has 14 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29.

  Therefore we have to use NAT overload (or PAT)

  Double click on the Weaver router to open it

  Router>enable Router#configure terminal

  First you should change the router's name to Weaver

  Router(config)#hostname Weaver

  Create a NAT pool of global addresses to be allocated with their netmask.

  Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248

  Create a standard access control list that permits the addresses that are to be translated.

  Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15

  Establish dynamic source translation, specifying the access list that was defined in the prior step.

  Weaver(config)#ip nat inside source list 1 pool mypool overload

  This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105

  to 198.18.184.110).

  Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports.

  The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements.

  This is how to configure the NAT inside and NAT outside, just for your understanding:

  Weaver(config)#interface fa0/0Weaver(config-if)#ip nat insideWeaver(config-if)#exitWeaver(config)#interface s0/0Weaver(config-if)#ip nat outsideWeaver(config-if)#end

  Finally, we should save all your work with the following command:

  Weaver#copy running-config startup-config

  Check your configuration by going to "Host for testing" and type:

  C :\>ping 192.0.2.114

  The ping should work well and you will be replied from 192.0.2.114

• Question 54:

  On a corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?

  A. a router with subinterfaces configured on the physical interface that is connected to the switch
  B. a router with an IP address on the physical interface connected to the switch
  C. a switch with an access link that is configured between the switches
  D. a switch with a trunk link that is configured between the switches
  A. a router with subinterfaces configured on the physical interface that is connected to the switch

  ---

  Different VLANs can't communicate with each other, they can communicate with the help of Layer3 router. Hence, it is needed to connect a router to a switch, then make the sub-interface on the router to connect to the switch, establishing Trunking links to achieve communications of devices which belong to different VLANs.

  When using VLANs in networks that have multiple interconnected switches, you need to use VLAN trunking between the switches. With VLAN trunking, the switches tag each frame sent between switches so that the receiving switch knows to what VLAN the frame belongs. End user devices connect to switch ports that provide simple connectivity to a single VLAN each. The attached devices are unaware of any VLAN structure.

  By default, only hosts that are members of the same VLAN can communicate. To change this and allow inter-VLAN communication, you need a router or a layer 3 switch.

  Here is the example of configuring the router for inter-vlan communication RouterA(config)#int f0/0.1 RouterA(config-subif)#encapsulation ? dot1Q IEEE 802.1Q Virtual LAN RouterA(config-subif)#encapsulation dot1Q or isl VLAN ID RouterA(config-subif)# ip address x.x.x.x y.y.y.y

• Question 55:

  Refer to the exhibit.

  

  Which three statements correctly describe Network Device A? (Choose three.)

  A. With a network wide mask of 255.255.255.128, each interface does not require an IP address.
  B. With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.
  C. With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other.
  D. With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.
  E. With a network wide mask of 255.255.254.0, each interface does not require an IP address.
  B. With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet.
  D. With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other.
  E. With a network wide mask of 255.255.254.0, each interface does not require an IP address.

  ---

  If Subnet Mask is 255.255.255.128 the hosts vary from x.x.x.0 - x.x.x.127 and x.x.x.128- x.x.x.255, so the IP Addresses of 2 hosts fall in different subnets so each interface needs an IP an address so that they can communicate each other.

  If Subnet Mask is 255.255.255.0 the 2 specified hosts fall in different subnets so they need a Layer 3 device to communicate.

  If Subnet Mask is 255.255.254.0 the 2 specified hosts are in same subnet so are in network address and can be accommodated in same Layer 2 domain and can communicate with each other directly using the Layer 2 address.

• Question 56:

  On which options are standard access lists based?

  A. destination address and wildcard mask
  B. destination address and subnet mask
  C. source address and subnet mask
  D. source address and wildcard mask
  D. source address and wildcard mask

  ---

  Standard ACL's only examine the source IP address/mask to determine if a match is made. Extended ACL's examine the source and destination address, as well as port information.

• Question 57:

  What are three components that comprise the SNMP framework? (Choose three.)

  A. MIB
  B. agent
  C. set
  D. AES
  E. supervisor
  F. manager
  A. MIB
  B. agent
  F. manager

  ---

  The SNMP framework consists of three parts:

  An SNMP manager -- The system used to control and monitor the activities of network devices using SNMP.

  

  An SNMP agent -- The software component within the managed device that maintains the data for the device and reports these data, as needed, to managing systems. Cisco Nexus 1000V supports the agent and MIB. To enable the

  

  SNMP agent, you must define the relationship between the manager and the agent.

  A managed information base (MIB) -- The collection of managed objects on the SNMP agent.

  

  SNMP is defined in RFCs 3411 to 3418.

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0_4_s_v_1_3/system_management/configuration/guide/n1000v_system/n1000v_system_10snmp.html

• Question 58:

  Which command reveals the last method used to powercycle a router?

  A. show reload
  B. show boot
  C. show running-config
  D. show version
  D. show version

  ---

  The "show version" command can be used to show the last method to powercycle (reset) a router.

  

• Question 59:

  Where does routing occur within the DoD TCP/IP reference model?

  A. application
  B. internet
  C. network
  D. transport
  B. internet

  ---

  The picture below shows the comparison between TCP/IP model and OSI model. Notice that the Internet Layer of TCP/IP is equivalent to the Network Layer which is responsible for routing decision.

  

• Question 60:

  What is the danger of the permit any entry in a NAT access list?

  A. It can lead to overloaded resources on the router.
  B. It can cause too many addresses to be assigned to the same interface.
  C. It can disable the overload command.
  D. It prevents the correct translation of IP addresses on the inside network.
  A. It can lead to overloaded resources on the router.