Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 331:

  Refer to the diagram.

  

  All hosts have connectivity with one another. Which statements describe the addressing scheme that is in use in the network? (Choose three.)

  A. The subnet mask in use is 255.255.255.192.
  B. The subnet mask in use is 255.255.255.128.
  C. The IP address 172.16.1.25 can be assigned to hosts in VLAN1
  D. The IP address 172.16.1.205 can be assigned to hosts in VLAN1
  E. The LAN interface of the router is configured with one IP address.
  F. The LAN interface of the router is configured with multiple IP addresses.
  B. The subnet mask in use is 255.255.255.128.
  C. The IP address 172.16.1.25 can be assigned to hosts in VLAN1
  F. The LAN interface of the router is configured with multiple IP addresses.

  ---

  The subnet mask in use is 255.255.255.128: This is subnet mask will support up to 126 hosts, which is needed.

  The IP address 172.16.1.25 can be assigned to hosts in VLAN1: The usable host range in this subnet is 172.16.1.1-172.16.1.126

  The LAN interface of the router is configured with multiple IP addresses: The router will need 2 subinterfaces for the single physical interface, one with an IP address that belongs in each VLAN.

• Question 332:

  A router has two Fast Ethernet interfaces and needs to connect to four VLANs in the local network. How can you accomplish this task, using the fewest physical interfaces and without decreasing network performance?

  A. Use a hub to connect the four VLANS with a Fast Ethernet interface on the router.
  B. Add a second router to handle the VLAN traffic.
  C. Add two more Fast Ethernet interfaces.
  D. Implement a router-on-a-stick configuration.
  D. Implement a router-on-a-stick configuration.

  ---

  A router on a stick allows you to use sub-interfaces to create multiple logical networks on a single physical interface.

• Question 333:

  Refer to the exhibit.

  

  The network administrator normally establishes a Telnet session with the switch from host A. However, host A is unavailable. The administrator's attempt to telnet to the switch from host B fails, but pings to the other two hosts are successful. What is the issue?

  A. Host B and the switch need to be in the same subnet.
  B. The switch interface connected to the router is down.
  C. Host B needs to be assigned an IP address in VLAN 1.
  D. The switch needs an appropriate default gateway assigned.
  E. The switch interfaces need the appropriate IP addresses assigned.
  D. The switch needs an appropriate default gateway assigned.

  ---

  Ping was successful form host B to other hosts because of intervlan routing configured on router. But to manage switch via telnet the VLAN32 on the switch needs to be configured interface vlan32 along with ip address and its appropriate

  default-gateway address.

  Since VLAN1 interface is already configure on switch Host A was able to telnet switch.

• Question 334:

  Which three statements about HSRP operation are true? (Choose three.)

  A. The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
  B. The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
  C. HSRP supports only clear-text authentication.
  D. The HSRP virtual IP address must be on a different subnet than the routers' interfaces on the same LAN.
  E. The HSRP virtual IP address must be the same as one of the router's interface addresses on the LAN.
  F. HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.
  A. The virtual IP address and virtual MA+K44C address are active on the HSRP Master router.
  B. The HSRP default timers are a 3 second hello interval and a 10 second dead interval.
  F. HSRP supports up to 255 groups per interface, enabling an administrative form of load balancing.

  ---

  The virtual MAC address of HSRP version 1 is 0000.0C07.ACxx, where xx is the HSRP group number in hexadecimal based on the respective interface. For example, HSRP group 10 uses the HSRP virtual MAC address of 0000.0C07.AC0A. HSRP version 2 uses a virtual MAC address of 0000.0C9F.FXXX (XXX: HSRP group in hexadecimal).

• Question 335:

  Why will a switch never learn a broadcast address?

  A. Broadcasts only use network layer addressing.
  B. A broadcast frame is never forwarded by a switch.
  C. A broadcast address will never be the source address of a frame.
  D. Broadcast addresses use an incorrect format for the switching table.
  E. Broadcast frames are never sent to switches.
  C. A broadcast address will never be the source address of a frame.

  ---

  Switches dynamically learn MAC addresses based on the source MAC addresses that it sees, and since a broadcast is never the source, it will never learn the broadcast address.

• Question 336:

  Which command enables IPv6 forwarding on a Cisco router?

  A. ipv6 local
  B. ipv6 host
  C. ipv6 unicast-routing
  D. ipv6 neighbor
  C. ipv6 unicast-routing

  ---

  To enable IPv6 routing on the Cisco router use the following command:

  ipv6 unicast-routing

  If this command is not recognized, your version of IOS does not support IPv6.

• Question 337:

  Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?

  A. IETF
  B. ANSI Annex D
  C. Q9333-A Annex A
  D. HDLC
  A. IETF

  ---

  Cisco supports two Frame Relay encapsulation types: the Cisco encapsulation and the IETF Frame Relay encapsulation, which is in conformance with RFC 1490 and RFC 2427. The former is often used to connect two Cisco routers while the latter is used to connect a Cisco router to a non-Cisco router. You can test with your Cisco router when typing the command Router(config-if)#encapsulation frame-relay ? on a WAN link. Below is the output of this command (notice Cisco is the default encapsulation so it is not listed here, just press Enter to use it).

  

  Note: Three LMI options are supported by Cisco routers are ansi, Cisco, and Q933a. They represent the ANSI Annex D, Cisco, and ITU Q933-A (Annex A) LMI types, respectively. HDLC is a WAN protocol same as Frame-Relay and PPP so it is not a Frame Relay encapsulation type.

• Question 338:

  Which two are features of IPv6? (Choose two.)

  A. anycast
  B. broadcast
  C. multicast
  D. podcast
  E. allcast
  A. anycast
  C. multicast

  ---

  IPv6 addresses are classified by the primary addressing and routing methodologies common in networking: unicast addressing, anycast addressing, and multicast addressing. A unicast address identifies a single network interface. The Internet Protocol delivers packets sent to a unicast address to that specific interface.

  

  An anycast address is assigned to a group of interfaces, usually belonging to different nodes. A packet sent to an anycast address is delivered to just one of the member interfaces, typically the nearest host, according to the routing

  

  protocol's definition of distance. Anycast addresses cannot be identified easily, they have the same format as unicast addresses, and differ only by their presence in the network at multiple points. Almost any unicast address can be employed as an anycast address. A multicast address is also used by multiple hosts, which acquire the multicast address destination by participating in the multicast distribution protocol among the network routers. A packet that is sent to a multicast address is delivered to

  

  all interfaces that have joined the corresponding multicast group.

• Question 339:

  Refer to the graphic.

  

  Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

  A. the MAC address of router interface e0
  B. the MAC address of router interface e1
  C. the MAC address of the server network interface
  D. the MAC address of host A
  A. the MAC address of router interface e0

  ---

  Whereas switches can only examine and forward packets based on the contents of the MAC header, routers can look further into the packet to discover the network for which a packet is destined. Routers make forwarding decisions based on the packet's network-layer header (such as an IPX header or IP header). These network-layer headers contain source and destination network addresses. Local devices address packets to the router's MAC address in the MAC header. After receiving the packets, the router must perform the following steps:

  1.

  Check the incoming packet for corruption, and remove the MAC header. The router checks the packet for MAC-layer errors. The router then strips off the MAC header and examines the network-layer header to determine what to do with the packet.

  2.

  Examine the age of the packet. The router must ensure that the packet has not come too far to be forwarded. For example, IPX headers contain a hop count. By default, 15 hops is the maximum number of hops (or routers) that a packet can cross. If a packet has a hop count of 15, the router discards the packet. IP headers contain a Time to Live (TTL) value. Unlike the IPX hop count, which increments as the packet is forwarded through each router, the IP TTL value decrements as the IP packet is forwarded through each router. If an IP packet has a TTL value of 1, the router discards the packet. A router cannot decrement the TTL value to 1 and then forward the packet.

  3.

  Determine the route to the destination. Routers maintain a routing table that lists available networks, the direction to the desired network (the outgoing interface number), and the distance to those networks. After determining which direction to forward the packet, the router must build a new header. (If you want to read the IP routing tables on a Windows 95/98 workstation, type ROUTE PRINT in the DOS box.)

  4.

  Build the new MAC header and forward the packet. Finally, the router builds a new MAC header for the packet. The MAC header includes the router's MAC address and the final destination's MAC address or the MAC address of the next router in the path.

• Question 340:

  Which three elements must be used when you configure a router interface for VLAN trunking? (Choose three.)

  A. one physical interface for each subinterface
  B. one IP network or subnetwork for each subinterface
  C. a management domain for each subinterface
  D. subinterface encapsulation identifiers that match VLAN tags
  E. one subinterface per VLAN
  F. subinterface numbering that matches VLAN tags
  B. one IP network or subnetwork for each subinterface
  D. subinterface encapsulation identifiers that match VLAN tags
  E. one subinterface per VLAN

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  This scenario is commonly called a router on a stick. A short, well written article on this operation can be found here: http://www.thebryantadvantage.com/RouterOnAStickCCNACertificationExamTutorial.htm