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Q41. DRAG DROP - (Topic 1)

On the left are various network protocols. On the right are the layers of the TCP/IP model. Assuming a reliable connection is required, move the protocols on the left to the TCP/IP layers on the right to show the proper encapsulation for an email message sent by a host on a LAN. (Not all options are used.)

Answer:

Q42. - (Topic 3)

How many bits are contained in each field of an IPv6 address?

A. 24

B. 4

C. 8

D. 16

Answer: D

Explanation:

One of the key advantages IPv6 brings is the exponentially larger address space. The

following will outline the basic address architecture of IPv6. 128-bit-long addresses Represented in hexadecimal format: Uses CIDR principles: prefix/prefix length x:x:x:x:x:x:x:x, where x is a 16-bit hex field The last 64 bits are used for the interface ID http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd 8026003d.pdf

Q43. - (Topic 1)

Refer to the topology and switching table shown in the graphic.

Host B sends a frame to Host C. What will the switch do with the frame?

A. Drop the frame

B. Send the frame out all ports except port 0/2

C. Return the frame to Host B

D. Send an ARP request for Host C

E. Send an ICMP Host Unreachable message to Host B

F. Record the destination MAC address in the switching table and send the frame directly to Host C

Answer: B

Q44. - (Topic 1)

Refer to the exhibit.

SwitchA receives the frame with the addressing shown in the exhibit. 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 forward the frame out port Fa0/3 only.

D. It will flood the frame out all ports.

E. It will flood the frame out all ports except Fa0/3.

Answer: E

Explanation:

When frame receives the frame, it checks the source address on MAC table if MAC address found in MAC table it tries to forward if not in MAC table adds the Address on MAC table. After checking the source address, it checks the destination address on MAC table, if MAC address found on MAC table it forwards to proper ports otherwise floods on all ports except the source port.

Q45. - (Topic 1)

On a Cisco switch, which protocol determines if an attached VoIP phone is from Cisco or from another vendor?

A. RTP

B. TCP

C. CDP

D. UDP

Answer: C

Explanation:

The Cisco Unified IP Phone uses CDP to communicate information such as auxiliary VLAN ID, per port power management details, and Quality of Service (QoS) configuration information with the Cisco Catalyst switch. Cisco Discovery Protocol (CDP) is a proprietary protocol designed by Cisco to help administrators collect information about both locally attached and remote devices. By using CDP, you can gather hardware and protocol information about neighbor devices, which is useful info for troubleshooting the network. CDP messages are generated every 60 seconds as multicast messages on each of its active interfaces. The information shared in a CDP packet about a Cisco device includes the following: Name of the device configured with the hostname command IOS software version Hardware capabilities, such as routing, switching, and/or bridging Hardware platform, such as 2600, 2950, or 1900 The layer-3 address(es) of the device The interface the CDP update was generated on

Reference: http://computernetworkingnotes.com/cisco-devices-administration-and-configuration/cisco-discoveryprotocol.html

Q46. - (Topic 1)

A network administrator is connecting PC hosts A and B directly through their Ethernet interfaces as shown in the graphic. Ping attempts between the hosts are unsuccessful. What can be done to provide connectivity between the hosts? (Choose two.)

A. A crossover cable should be used in place of the straight-through cable.

B. A rollover cable should be used in place of the straight-through cable.

C. The subnet masks should be set to 255.255.255.192

D. A default gateway needs to be set on each host.

E. The hosts must be reconfigured to use private IP addresses for direct connections of this type.

F. The subnet masks should be set to 255.255.255.0

Answer: A,F

Explanation:

If you need to connect two computers but you don't have access to a network and can't set up an ad hoc network, you can use an Ethernet crossover cable to create a direct cable connection. Generally speaking, a crossover cable is constructed by reversing (or crossing over) the order of the wires inside so that it can connect two computers directly. A crossover cable looks almost exactly like a regular Ethernet cable (a straight-through cable), so make sure you have a crossover cable before following these steps.

Both devices need to be on the same subnet, and since one PC is using 192.1.1.20 and the other is using 192.1.1.201, the subnet mask should be changed to 255.255.255.0.

Q47. - (Topic 4)

What is the best practice when assigning IP addresses in a small office of six hosts?

A. Use a DHCP server that is located at the headquarters.

B. Use a DHCP server that is located at the branch office.

C. Assign the addresses by using the local CDP protocol.

D. Assign the addresses statically on each node.

Answer: D

Explanation:

Its best to use static addressing scheme where the number of systems is manageable rather than using a dynamic method such as DHCP as it is easy to operate and manage.

Q48. - (Topic 1)

Which network device functions only at Layer 1 of the OSI model? A. Option A

B. Option B

C. Option C

D. Option D

E. Option E

Answer: B

Explanation:

Most hubs are amplifying the electrical signal; therefore, they are really repeaters with several ports. Hubs and repeaters are Layer 1 (physical layer) devices.

Q49. - (Topic 7)

What is one requirement for interfaces to run IPv6?

A. An IPv6 address must be configured on the interface.

B. An IPv4 address must be configured.

C. Stateless autoconfiguration must be enabled after enabling IPv6 on the interface.

D. IPv6 must be enabled with the ipv6 enable command in global configuration mode.

Answer: A

Explanation: To use IPv6 on your router, you must, at a minimum, enable the protocol and assign IPv6 addresses to your interfaces.

Q50. - (Topic 3)

The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance. As part of examining the router resources, the OSPF DRs need to be known. All the router OSPF priorities are at the default and the router IDs are shown with each router.

Which routers are likely to have been elected as DR? (Choose two.)

A. Corp-1

B. Corp-2

C. Corp-3

D. Corp-4

E. Branch-1

F. Branch-2

Answer: D,F

Explanation:

There are 2 segments on the topology above which are separated by Corp-3 router. Each

segment will have a DR so we have 2 DRs.

To select which router will become DR they will compare their router-IDs. The router with

highest (best) router-ID will become DR. 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.

In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router’s physical interfaces. Router Corp-4 (10.1.40.40)

& Branch-2 (10.2.20.20) have highest “active” IP addresses so they will become DRs.