Cisco 100-101 Online Practice Questions and Exam Preparation

Cisco 100-101 Online Questions & Answers

• Question 31:

  A company has placed a networked PC in a lobby so guests can have access to the corporate directory.

  A security concern is that someone will disconnect the directory PC and re-connect their laptop computer and have access to the corporate network. For the port servicing the lobby, which three configuration steps should be performed on the switch to prevent this? (Choose three.)

  A. Enable port security.
  B. Create the port as a trunk port.
  C. Create the port as an access port.
  D. Create the port as a protected port.
  E. Set the port security aging time to 0.
  F. Statically assign the MAC address to the address table.
  G. Configure the switch to discover new MAC addresses after a set time of inactivity.
  A. Enable port security.
  C. Create the port as an access port.
  F. Statically assign the MAC address to the address table.

  ---

  If port security is enabled and the port is only designated as access port, and finally static MAC address is assigned, it ensures that even if a physical connection is done by taking out the directory PC and inserting personal laptop or device, the connection cannot be made to the corporate network, hence ensuring safety.

• Question 32:

  Refer to the exhibit.

  

  The network is converged.After link-state advertisements are received from Router_A, what information will Router_E contain in its routing table for the subnets 208.149.23.64 and 208.149.23.96?

  A. 208.149.23.64[110/13] via 190.173.23.10, 00:00:07, FastEthemet0/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, FastEthemet0/0
  B. 208.149.23.64[110/1] via 190.172.23.10, 00:00:07, Serial1/0 208.149.23.96[110/3] via 190.173.23.10, 00:00:16, FastEthemet0/0
  C. 208.149.23.64[110/13] via 190.173.23.10, 00:00:07, Serial1/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, Serial1/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, FastEthemet0/0
  D. 208.149.23.64[110/3] via 190.172.23.10, 00:00:07, Serial1/0 208.149.23.96[110/3] via 190.173.23.10, 00:00:16, Serial1/0
  A. 208.149.23.64[110/13] via 190.173.23.10, 00:00:07, FastEthemet0/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, FastEthemet0/0

  ---

  Router_E learns two subnets subnets 208.149.23.64 and 208.149.23.96 via Router_A through FastEthernet interface. The interface cost is calculated with the formula 10 / Bandwidth. For 8 8 FastEthernet it is 10 / 100 Mbps = 10 /

  100,000,000 = 1. Therefore the cost is 12 (learned from Router_A) + 1 = 13 for both subnets ->

  The cost through T1 link is much higher than through T3 link (T1 cost = 10 / 1.544 Mbps = 64; T3 cost = 10 / 45 Mbps = 2) so surely OSPF will choose the path through T3 link -> Router_E will choose the path from Router_A through

  FastEthernet0/0, not Serial1/0. In fact, we can quickly eliminate answers B, C and D because they contain at least one subnet learned from Serial1/0 -> they are surely incorrect.

• Question 33:

  Refer to the exhibit.

  

  Which command would you use to configure a static route on Router1 to network 192.168.202.0/24 with a nondefault administrative distance?

  A. router1(config)#ip route 1 192.168.201.1 255.255.255.0 192.168.201.2
  B. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 1
  C. router1(config)#ip route 5 192.168.202.0 255.255.255.0 192.168.201.2
  D. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 5
  D. router1(config)#ip route 192.168.202.0 255.255.255.0 192.168.201.2 5

  ---

  Since it has /24 CIDR and it also has a non default administrative distance, the answer has to be option D.

• Question 34:

  

  Which two of the following are true regarding the configuration of RouterA? (Choose two.)

  A. At least 5 simultaneous remote connections are possible
  B. Only telnet protocol connections to RouterA are supported
  C. Remote connections to RouterA using telnet will succeed
  D. Console line connections will nevertime out due to inactivity
  E. Since DHCP is not used on Fa0/1 there is not a need to use the NAT protocol
  A. At least 5 simultaneous remote connections are possible
  C. Remote connections to RouterA using telnet will succeed

  ---

  The IP address can accommodate 5 hosts at least, telnet can be accessed on the router

• Question 35:

  An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address.

  Which of the following should be entered into the IP properties box for the sales server?

  A. IP address: 192.168.20.14 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.9
  B. IP address: 192.168.20.254 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.20.1
  C. IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25
  D. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.17
  E. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.25
  C. IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25

• Question 36:

  Refer to the exhibit.

  

  SwitchA receives the frame with the addressing shown. According to the command output also shown in the exhibit, how will SwitchA handle this frame?

  A. It will drop the frame.
  B. It will forward the frame out port Fa0/6 only.
  C. It will flood the frame out all ports.
  D. It will flood the frame out all ports except Fa0/3.
  D. It will flood the frame out all ports except Fa0/3.

• Question 37:

  How many simultaneous Telnet sessions does a Cisco router support by default?

  A. 1
  B. 2
  C. 3
  D. 4
  E. 5
  F. 6
  E. 5

• Question 38:

  Why would a network administrator configure port security on a switch?

  A. to prevent unauthorized Telnet access to a switch port
  B. to prevent unauthorized hosts from accessing the LAN
  C. to limit the number of Layer 2 broadcasts on a particular switch port
  D. block unauthorized access to the switch management interfaces
  B. to prevent unauthorized hosts from accessing the LAN

  ---

  You can use the port security feature to restrict input to an interface by limiting and identifying MAC addresses of the stations allowed to access the port. When you assign secure MAC addresses to a secure port, the port does not forward packets with source addresses outside the group of defined addresses. If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the workstation attached to that port is assured the full bandwidth of the port. If a port is configured as a secure port and the maximum number of secure MAC addresses is reached, when the MAC address of a station attempting to access the port is different from any of the identified secure MAC addresses, a security violation occurs. Also, if a station with a secure MAC address configured or learned on one secure port attempts to access another secure port, a violation is flagged.

• Question 39:

  Which address are OSPF hello packets addressed to on point-to-point networks?

  A. 224.0.0.5
  B. 172.16.0.1
  C. 192.168.0.5
  D. 223.0.0.1
  E. 254.255.255.255
  A. 224.0.0.5

  ---

  Why Does the show ip ospf neighbor Command Reveal Neighbors in the Init State? http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f11.shtml OSPF hello packets have a destination address of 224.0.0.5 (the all ospf routers multicast address).

• Question 40:

  Why do large OSPF networks use a hierarchical design? (Choose three.)

  A. to decrease latency by increasing bandwidth
  B. to reduce routing overhead
  C. to speed up convergence
  D. to confine network instability to single areas of the network
  E. to reduce the complexity of router configuration
  F. to lower costs by replacing routers with distribution layer switches
  B. to reduce routing overhead
  C. to speed up convergence
  D. to confine network instability to single areas of the network

  ---

  OSPF implements a two-tier hierarchical routing model that uses a core or backbone tier known as area zero (0). Attached to that backbone via area border routers (ABRs) are a number of secondary tier areas.

  The hierarchical approach is used to achieve the following:

  

  Rapid convergence because of link and/or switch failures

  

  Deterministic traffic recovery

  

  Scalable and manageable routing hierarchy, reduced routing overhead.