Cisco 200-105 Online Practice Questions and Exam Preparation

Cisco 200-105 Online Questions & Answers

• Question 1:

  Refer to the exhibit. Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made.

  Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)

  

  A. SwitchA, Fa0/2, designated
  B. SwitchA, Fa0/1, root
  C. SwitchB, Gi0/2, root
  D. SwitchB, Gi0/1, designated
  E. SwitchC, Fa0/2, root
  F. SwitchD, Gi0/2, root
  A. SwitchA, Fa0/2, designated
  B. SwitchA, Fa0/1, root
  F. SwitchD, Gi0/2, root

  ---

  The question says "no other configuration changes have been made" so we can understand these switches have the same bridge priority. SwitchC has lowest MAC address so, it will become root bridge and 2 of its ports (Fa0/1 and Fa0/2) will be designated ports (DP). Because SwitchC is the root bridge the 2 ports nearest SwitchC on SwitchA (Fa0/1) and SwitchD (Gi0/2) will be rootports (RP) -> B and F are correct. SwitchB must have a root port so which port will it choose? To answer this question, we need to know about STP cost and port cost. In general, "cost" is calculated based on bandwidth of the link. The higher the bandwidth on a link, the lower the value of its cost. Below are the cost values you should memorize: Link speed Cost SwitchB will choose the interface with lower cost to the root bridge as the root port so we must calculate the cost on interface Gi0/1 and Gi0/2 of SwitchB to the root bridge. This can be calculated from the "cost to the root bridge" of each switch because a switch always advertises its cost to the root bridge in its BPDU. The receiving switch will add its local port cost value to the cost in the BPDU. SwitchC advertises its cost to the root bridge with a value of 0. Switch D adds 4 (the cost value of 1Gbps link) and advertises this value (4) to SwitchB. SwitchB adds another 4 and learns that it can reach SwitchC via Gi0/1 port with a total cost of 8. The same process happens for SwitchA and SwitchB learns that it can reach SwitchC via Gi0/2 with a total cost of 23 -> Switch B chooses Gi0/1 as its root port. Now our last task is to identify the port roles of the ports between SwitchA and SwitchB. It is rather easy as the MAC address of SwitchA is lower than that of SwitchB so Fa0/2 of SwitchA will be designated port while Gi0/2 of SwitchB will be alternative port.

• Question 2:

  Which of the following HSRP router states does an active router enter when it is preempted by a higher priority router?

  A. Active
  B. Speak
  C. Learn
  D. Listen
  E. Init
  F. Standby
  B. Speak

• Question 3:

  What is the effect of the switchport access vlan 300 command?

  A. It configures the interface to perform Layer 2 switching
  B. It displays the VLAN configuration of the interface
  C. It configures the interface as an access port
  D. It assigns the interface to a VLAN
  D. It assigns the interface to a VLAN

• Question 4:

  Instructions

  This item contains several questions that you must answer. You can view these questions by clicking on the corresponding button to the left. Changing questions can be accomplished by clicking the numbers to the left of each question. In

  order to complete the questions, you will need to refer to the topology.

  To gain access to the topology, click on the topology button at the bottom of the screen. When you have finished viewing the topology, you can return to your questions by clicking on the Questions button to the left.

  Each of the windows can be minimized by clicking on the [-]. You can also reposition a window by dragging it by the title bar.

  Scenario

  Refer to the topology. Using the information shown, answer the four questions shown on the Questions tab.

  

  After the network has converged, what type of messaging, if any, occurs between R3 and R4?

  A. No messages are exchanged.
  B. Hellos are sent every 10 seconds.
  C. The full database from each router is sent every 30 seconds.
  D. The routing table from each router is sent every 60 seconds.
  B. Hellos are sent every 10 seconds.

  ---

  HELLO messages are used to maintain adjacent neighbors so even when the network is converged, hellos are still exchanged. On broadcast and point-to-point links, the default is 10 seconds, on NBMA the default is 30 seconds.

• Question 5:

  Refer to the exhibit. Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

  

  A. 252
  B. 253
  C. 254
  D. 255
  B. 253

  ---

  From the CCNA ICND2 Exam book: "Routers decrement the TTL by 1 every time they forward a packet; if a router decrements the TTL to 0, it throws away the packet. This prevents packets from rotating forever." I want to make it clear that before the router forwards a packet, the TTL is still remain the same. For example, in the topology above, pings to S0/1 and S0/0 of Router 2 have the same TTL. The picture below shows TTL values for each interface of each router and for HostB. Notice that Host A initializes ICMP packet with a TTL of 255:

  

• Question 6:

  Which channel mode is available to static EhterChannels?

  A. On
  B. Passive
  C. Active
  D. Desirable
  A. On

• Question 7:

  Which two factors can affect the price of leased point-to-point WAN links? (Choose two.)

  A. amount of bandwidth used
  B. type of traffic
  C. amount of bandwidth requested
  D. number of sites interconnected
  E. distance between two points
  A. amount of bandwidth used
  E. distance between two points

• Question 8:

  Drag and drop the descriptions of EtherChannel protocols from the left onto the correct protocols on the right.

  Select and Place:

  

  

• Question 9:

  Which protocol authenticates connected devices before allowing them to access the LAN?

  A. 802.1d
  B. 802.11
  C. 802.1w
  D. 802.1x
  D. 802.1x

  ---

  802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The supplicant is a client device (such as a laptop) that wishes to attach to the LAN/WLAN. The term 'supplicant' is also used interchangeably to refer to the software running on the client that provides credentials to the authenticator. The authenticator is a network device, such as an Ethernet switch or wireless access point; and the authentication server is typically a host running software supporting the RADIUS and EAP protocols.

  The authenticator acts like a security guard to a protected network. The supplicant (i.e., client device) is not allowed access through the authenticator to the protected side of the network until the supplicant's identity has been validated and authorized. An analogy to this is providing a valid visa at the airport's arrival immigration before being allowed to enter the country. With 802.1X port-based authentication, the supplicant provides credentials, such as user name/password or digital certificate, to the authenticator, and the authenticator forwards the credentials to the authentication server for verification. If the authentication server determines the credentials are valid, the supplicant (client device) is allowed to access resources located on the protected side of the network.

• Question 10:

  You are working in a data center environment and are assigned the address range 10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.

  Which IP address range meets these requirements?

  A. 10.188.31.0/26
  B. 10.188.31.0/25
  C. 10.188.31.0/28
  D. 10.188.31.0/27
  E. 10.188.31.0/29
  D. 10.188.31.0/27