Cisco 200-120 Online Practice Questions and Exam Preparation

Cisco 200-120 Online Questions & Answers

• Question 131:

  Refer to the exhibit.

  

  In this VLSM addressing scheme, what summary address would be sent from router A?

  A. 172.16.0.0 /16
  B. 172.16.0.0 /20
  C. 172.16.0.0 /24
  D. 172.32.0.0 /16
  E. 172.32.0.0 /17
  F. 172.64.0.0 /16
  A. 172.16.0.0 /16

  ---

  Router A receives 3 subnets: 172.16.64.0/18, 172.16.32.0/24 and 172.16.128.0/18.

  All these 3 subnets have the same form of 172.16.x.x so our summarized subnet must be also in that form -> Only A, B or .

  The smallest subnet mask of these 3 subnets is /18 so our summarized subnet must also have its subnet mask equal or smaller than /18.

  -> Only answer A has these 2 conditions ->.

• Question 132:

  DRAG DROP

  Refer to the exhibit. PC_1 is exchanging packets with the FTP server. Consider the packets as they leave RouterB interface Fa0/1 towards RouterA. Drag the correct frame and packet addresses to their place in the table.

  Select and Place:

  

  

• Question 133:

  What will be the result if the following configuration commands are implemented on a Cisco switch?

  Switch(config-if)# switchport port-security Switch(config-if)# switchport port-security mac-address sticky

  A. A dynamically learned MAC address is saved in the startup-configuration file.
  B. A dynamically learned MAC address is saved in the running-configuration file.
  C. A dynamically learned MAC address is saved in the VLAN database.
  D. Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received.
  E. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received.
  B. A dynamically learned MAC address is saved in the running-configuration file.

  ---

  In the interface configuration mode, the command switchport port-security mac-address sticky enables sticky learning. When entering this command, the interface converts all the dynamic secure MAC addresses to sticky secure MAC addresses.

• Question 134:

  How does a DHCP server dynamically assign IP addresses to hosts?

  A. Addresses are permanently assigned so that the host uses the same address at all times.
  B. Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.
  C. Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.
  D. Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.
  C. Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.

  ---

  DHCP works in a client/server mode and operates like any other client/server relationship. When a PC connects to a DHCP server, the server assigns or leases an IP address to that PC. The PC connects to the network with that leased IP address until the lease expires. The host must contact the DHCP server periodically to extend the lease. This lease mechanism ensures that hosts that move or power off do not hold onto addresses that they do not need. The DHCP server returns these addresses to the address pool and reallocates them as necessary.

• Question 135:

  What are three benefits of GLBP? (Choose three.)

  A. GLBP supports up to eight virtual forwarders per GLBP group.
  B. GLBP supports clear text and MD5 password authentication between GLBP group members.
  C. GLBP is an open source standardized protocol that can be used with multiple vendors.
  D. GLBP supports up to 1024 virtual routers.
  E. GLBP can load share traffic across a maximum of four routers.
  F. GLBP elects two AVGs and two standby AVGs for redundancy.
  B. GLBP supports clear text and MD5 password authentication between GLBP group members.
  D. GLBP supports up to 1024 virtual routers.
  E. GLBP can load share traffic across a maximum of four routers.

• Question 136:

  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.

• Question 137:

  Refer to the exhibit.

  

  C-router is to be used as a "router-on-a-stick" to route between the VLANs. All the interfaces have been properly configured and IP routing is operational. The hosts in the VLANs have been configured with the appropriate default gateway. What is true about this configuration?

  A. These commands need to be added to the configuration: C-router(config)# router eigrp 123 C-router(config-router)# network 172.19.0.0
  B. These commands need to be added to the configuration: C-router(config)# router ospf 1 C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0
  C. These commands need to be added to the configuration: C-router(config)# router rip C-router(config-router)# network 172.19.0.0
  D. No further routing configuration is required.
  D. No further routing configuration is required.

  ---

  Since all the same router (C-router) is the default gateway for all three VLANs, all traffic destined to a different VLA will be sent to the C-router. The C-router will have knowledge of all three networks since they will appear as directly connected in the routing table. Since the C-router already knows how to get to all three networks, no routing protocols need to be configured.

• Question 138:

  What is one benefit of PVST+?

  A. PVST+ supports Layer 3 load balancing without loops.
  B. PVST+ reduces the CPU cycles for all the switches in the network.
  C. PVST+ allows the root switch location to be optimized per VLAN.
  D. PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.
  C. PVST+ allows the root switch location to be optimized per VLAN.

  ---

  The PVST+ provides Layer 2 load-balancing for the VLAN on which it runs. You can create different logical topologies by using the VLANs on your network to ensure that all of your links are used but that no one link is oversubscribed. Each instance of PVST+ on a VLAN has a single root switch. This root switch propagates the spanning-tree information associated with that VLAN to all other switches in the network. Because each switch has the same information about the network, this process ensures that the network topology is maintained and optimized per VLAN.

  Reference: http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swstp.html

• Question 139:

  What is the difference between a CSU/DSU and a modem?

  A. A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.
  B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line.
  C. A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line.
  D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.
  D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line.

  ---

  CSU/DSU is used to convert digital signals from a router to a network circuit such as a T1, while a modem is used to convert digital signals over a regular POTS line.

• Question 140:

  Refer to the exhibit.

  

  If the router Cisco returns the given output and has not had its router ID set manually, what value will OSPF use as its router ID?

  A. 192.168.1.1
  B. 172.16.1.1
  C. 1.1.1.1
  D. 2.2.2.2
  D. 2.2.2.2

  ---

  If a router-id is not configured manually in the OSPF routing process the router will automatically configure a router-id determined from the highest IP address of a logical interface (loopback interface) or the highest IP address of an active interface. If more than one loopback interfaces are configured, the router will compare the IP addresses of each of the interfaces and choose the highest IP address from the loopbacks.