Cisco 100-101 Online Practice Questions and Exam Preparation

Cisco 100-101 Online Questions & Answers

• Question 21:

  Refer to the exhibit.

  

  A TFTP server has recently been installed in the Atlanta office. The network administrator is located in the NY office and has made a console connection to the NY router. After establishing the connection they are unable to backup the configuration file and IOS of the NY router to the TFTP server. What is the cause of this problem?

  A. The NY router has an incorrect subnet mask.
  B. The TFTP server has an incorrect IP address.
  C. The TFTP server has an incorrect subnet mask.
  D. The network administrator computer has an incorrect IP address.
  C. The TFTP server has an incorrect subnet mask.

  ---

  The subnet mast of the TFTP server needs to be in tune with the other network requirements else it won't be possible.

• Question 22:

  Refer to the exhibit.

  

  Which two statements are true about the loopback address that is configured on RouterB? (Choose two.)

  A. It ensures that data will be forwarded by RouterB.
  B. It provides stability for the OSPF process on RouterB.
  C. It specifies that the router ID for RouterB should be 10.0.0.1.
  D. It decreases the metric for routes that are advertised from RouterB.
  E. It indicates that RouterB should be elected the DR for the LAN.
  B. It provides stability for the OSPF process on RouterB.
  C. It specifies that the router ID for RouterB should be 10.0.0.1.

  ---

  A loopback interface never comes down even if the link is broken so it provides stability for the OSPF process (for example we use that loopback interface as the router-id) - The router-ID is chosen in the order below:

  + The highest IP address assigned to a loopback (logical) interface. + If a loopback interface is not defined, the highest IP address of all active router's physical interfaces will be chosen. -> The loopback interface will be chosen as the router ID of RouterB

• Question 23:

  Refer to the exhibit.

  

  Which default gateway address should be assigned to HostA?

  A. 192.168.1.1
  B. 192.168.1.65
  C. 192.168.1.66
  D. 192.168.1.129
  E. 10.1.1.1
  F. 10.1.1.2
  B. 192.168.1.65

  ---

  It should be one less than the switch IP to which it is connected so it will be B.

• Question 24:

  What is the effect of using the service password-encryption command?

  A. Only the enable password will be encrypted.
  B. Only the enable secret password will be encrypted.
  C. Only passwords configured after the command has been entered will be encrypted.
  D. It will encrypt the secret password and remove the enable secret password from the configuration.
  E. It will encrypt all current and future passwords.
  E. It will encrypt all current and future passwords.

  ---

  Encryption further adds a level of security to the system as anyone having access to the database of passwords cannot reverse the process of encryption to know the actual passwords which isn't the case if the passwords are stored simply.

• Question 25:

  Which parameter or parameters are used to calculate OSPF cost in Cisco routers?

  A. Bandwidth
  B. Bandwidth and Delay
  C. Bandwidth, Delay, and MTU
  D. Bandwidth, MTU, Reliability, Delay, and Load
  A. Bandwidth

  ---

  The well-known formula to calculate OSPF cost is Cost = 10 / Bandwidth

• Question 26:

  Refer to the exhibit.

  

  After the power-on-self test (POST), the system LED of a Cisco 2950 switch turns amber. What is the status of the switch?

  A. The POST was successful.
  B. The switch has a problem with the internal power supply and needs an external power supply to be attached.
  C. POST failed and there is a problem that prevents the operating system from being loaded.
  D. The switch has experienced an internal problem but data can still be forwarded at a slower rate.
  E. The switch passed POST, but all the switch ports are busy.
  C. POST failed and there is a problem that prevents the operating system from being loaded.

  ---

  http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a008012591 3.shtml

  Each time you power up the switch, eight Power-On Self Tests (POSTs) run automatically. POSTs check the most important system components before the switch begins to forward packets. When the switch begins the POST, the port status

  LEDs display amber for two seconds, and then display green. As each test runs, the port status LEDs go out. 1x is the first to go out. The port status LEDs for ports 2x through 8x go out sequentially as the system completes a test. When the

  POST completes successfully, the port status LEDs go out. This indicates that the switch is operational. If a test fails, the port status LED associated with the test displays amber.

  The system LED also displays amber.

  NotE. From Cisco IOS Software Release 11.2(8.5) SA6 onwards, the port and system LEDs both remain amber after a POST failure. In the earlier Cisco IOS Software Releases, only the LEDs of failed linked ports remained amber.

• Question 27:

  A switch has 48 ports and 4 VLANs. How many collision and broadcast domains exist on the switch (collision, broadcast)?

  A. 4, 48
  B. 48, 4
  C. 48, 1
  D. 1, 48
  E. 4, 1
  B. 48, 4

  ---

  A switch uses a separate collision domain for each port, and each VLAN is a separate broadcast domain.

• Question 28:

  What two things does a router do when it forwards a packet? (Choose two.)

  A. switches the packet to the appropriate outgoing interfaces
  B. computes the destination host address
  C. determines the next hop on the path
  D. updates the destination IP address
  E. forwards ARP requests
  A. switches the packet to the appropriate outgoing interfaces
  C. determines the next hop on the path

  ---

  Without following these two processes namely switching the packet to appropriate interface and telling the packet where to go by providing it with a destination IP address, the purpose of the same would not be solved.

• Question 29:

  OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? (Choose Three.)

  A. Each OSPF area requires a loopback interface to be configured.
  B. Areas may be assigned any number from 0 to 65535.
  C. Area 0 is called the backbone area.
  D. Hierarchical OSPF networks do not require multiple areas.
  E. Multiple OSPF areas must connect to area 0.
  F. Single area OSPF networks must be configured in area 1.
  B. Areas may be assigned any number from 0 to 65535.
  C. Area 0 is called the backbone area.
  E. Multiple OSPF areas must connect to area 0.

  ---

  Definition of OSPF areas: An OSPF network may be structured, or subdivided, into routing areas to simplify administration and optimize traffic and resource utilization. Areas are identified by 32-bit numbers, expressed either simply in decimal,

  or often in octet-based dot- decimal notation, familiar from IPv4 address notation.

  See discussion following Cisco Learning discussion.

  https://learningnetwork.cisco.com/message/90832

• Question 30:

  Which two statements describe the process identifier that is used in the command to configure OSPF on a router? (Choose two.) Router(config)# router ospf 1

  A. All OSPF routers in an area must have the same process ID.
  B. Only one process number can be used on the same router.
  C. Different process identifiers can be used to run multiple OSPF processes
  D. The process number can be any number from 1 to 65,535.
  E. Hello packets are sent to each neighbor to determine the processor identifier.
  C. Different process identifiers can be used to run multiple OSPF processes
  D. The process number can be any number from 1 to 65,535.

  ---

  Multiple OSPF processes can be configured on a router using multiple process ID's.

  The valid process ID's are shown below: Edge-B(config)#router ospf <1-65535> Process ID