CompTIA Network+ Certification Exam

 

 

QUESTION 11

Which of the following network devices use ACLs to prevent unauthorized access into company systems?

 

A.

IDS

B.

Firewall

C.

Content filter

D.

Load balancer

 

Correct Answer: B

Explanation:

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls arefrequently used to prevent unauthorized Internet users from accessing privatenetworks connected to the Internet, especially intranets. Firewalls use ACLs (access control lists) to determine which traffic is allowed through the firewall. All traffic entering or leaving the intranet passes through the firewall, which examines each message and blocks or allows the message depending on rules specified in the ACL. The rules in the ACL specify which combinations of source IP address, destination address in IP port numbers are allowed.

 

 

QUESTION 12

Which of the following is an example of an IPv4 address?

 

A.

192:168:1:55

B.

192.168.1.254

C.

00:AB:FA:B1:07:34

D.

::1

 

Correct Answer: B

Explanation:

AnIPv4 address is notated as four decimal numbers each between 0 and 255 separated by dots (xxx.xxx.xxx.xxx). Each number is known as an octet as it represents eight binary bits. All four octets make u
p a 32-bit binary IPv4 address.

In this question, 192.168.1.254 is a valid IPv4 address.

 

 

QUESTION 13

An administrator has a virtualization environment that includes a vSAN and iSCSI switching. Which of the following actions could the administrator take to improve the performance of data transfers over iSCSI switches?

 

A.

The administrator should configure the switch ports to auto-negotiate the proper Ethernet settings.

B.

The administrator should configure each vSAN participant to have its own VLAN.

C.

The administrator should connect the iSCSI switches to each other over inter-switch links (ISL).

D.

The administrator should set the MTU to 9000 on the each of the participants in the vSAN.

 

Correct Answer: D

Explanation:

When using an iSCSI SAN (with iSCSI switching), we can improve network performance by enabling `jumbo frames’. A jumbo frame is a frame with an MTU of more than 1500. By setting the MTU to 9000, there will be fewer but larger frames going over the network. Enabling jumbo frames can improve network performance by making data transmissions more efficient. The CPUs on switches and routers can only processone frame at a time. By putting a larger payload into each frame, the CPUs have fewer frames to process.

 

 

QUESTION 14

A company wants to create highly available datacenters. Which of the following will allow the company to continue to maintain an Internet presence at all sites in the event that a WAN circuit at one site goes down?

 

A.

Load balancer

B.

VRRP

C.

OSPF

D.

BGP

 

Correct Answer: D

Explanation:

A collection of networks that fall within the same administrative domain is called an autonomous system (AS). In this question, each datacenter will be an autonomous system.

The routers within an AS use an interior gateway protocol, such as the Routing Information Protocol (RIP) or the Open Shortest Path First (OSPF) protocol, to exchange routing information among themselves. At the edges of an AS are routers that communicate with the other AS’s on the Internet, using an exterior gateway protocol such as the Border Gateway Protocol (BGP).

If a WAN link goes down, BGP will route datathrough another WAN link if redundant WAN links are available.

 

 

QUESTION 15

Which of the following network topologies has a central, single point of failure?

 

A.

Ring

B.

Star

C.

C.Hybrid

D.

Mesh

 

Correct Answer: B

Explanation:

A Star network is the most common network in use today. Ethernet networks with computers connected to a switch (or a less commonly a hub) form a star network.

The switch forms the central component of the star. All network devices connect to the switch. A network switch has a MAC address table which it populates with the MAC address of every device connected to the switch. When the switch receives data on one of its ports from a computer, it looks in the MAC address table to discover which port the destination computer is connected to. The switch then unicasts the data out through the port that the destination computer is connected to.

The switch that forms thecentral component of a star network is a single point of failure. If the switch fails, no computers will be able to communicate with each other.

 

 

QUESTION 16

You have been tasked with testing a CAT5e cable. A summary of the test results can be found on the screen.

 

Step 1: Select the tool that was used to create the cable test results.

Step 2: Interpret the test results and select the option that explains the results. After you are done with your analysis, click the ‘Submit Cable Test Analysis’ button.

 

clip_image002

 

Correct Answer:

clip_image004

 

Explanation:

A Cable Certifier provides “Pass” or “Fail” information in accordance with industry standards but can also show detailed information when a “Fail” occurs. This includesshorts, the wire pairs involved and the distance to the short. When a short is identified, at the full length of the cable it means the cable has not been crimped correctly.

 

 

QUESTION 17

An F-connector is used on which of the following types of cabling?

 

A.

CAT3

B.

Single mode fiber

C.

CAT5

D.

RG6

 

Correct Answer: D

Explanation:

An F connector is a coaxial RF connector commonly used for terrestrial television, cable television and universally forsatellite television and cable modems, usually with RG-6/U cable or, in older installations, with RG-59/U cable.

 

 

 

 

 

 

QUESTION 18

Which of the following would be used in an IP-based video conferencing deployment? (Select TWO).

 

A.

RS-232

B.

56k modem

C.

Bluetooth

D.

Codec

E.

SIP

 

Correct Answer: DE

Explanation:

The term “codec” is a concatenation of “encoder” and “decoder”. In video conferencing, a codec is software (or can be hardware) that compresses (encodes) raw video data before it is transmitted overthe network. A codec on the receiving video conferencing device will then decompress (decode) the video signal for display on the conferencing display.

The Session Initiation Protocol (SIP) is a protocol for initiating an interactive user session that involves multimedia elements such as voice, chat, gaming, or in this case video.

 

 

QUESTION 19

A technician is connecting a NAS device to an Ethernet network. Which of the following technologies will be used to encapsulate the frames?

 

A.

A.HTTPS

B.

Fibre channel

C.

iSCSI

D.

MS-CHAP

 

Correct Answer: C

Explanation:

A NAS or a SAN will use either iSCSI or Fiber Channel. In this question, the NAS is connected to an Ethernet network. Therefore, iSCSI will most likely be used (Fiber Channel over Ethernet (FCoE) can be used but is less common). ISCSI means Internet SCSI. ISCSI uses TCP (Transmission Control Protocol) which enables it to be used over TCP/IP networks such as Ethernet.

For Fiber channel,a separate Fiber Channel network would be required unless FCoE is used.

 

 

QUESTION 20

A SQL server needs several terabytes of disk space available to do an uncompressed backup of a database. Which of the following devices would be the MOST cost efficient to use for this backup?

 

A.

iSCSI SAN

B.

FCoE SAN

C.

NAS

D.

USB flash drive

 

Correct Answer: C

Explanation:

A NAS is a Network Attached Storage device; typically a bunch of cheap hard disks, usually arranged in a Raid and consisting of either SAS (serial attached SCSI) or Sata disks just like the ones in most desktops.

A NAS is essentially a file server that connects to an Ethernet network and is configured with a TCP/IP address. A NAS supports Windows networking and works at the file level as opposedto a SAN (Storage Area Network) which works at the block level when dealing with data. You can access file shares on a NAS in the same way that you would access file shares on a file server.

A NAS is a much cheaper option than a SAN.

 

Free VCE & PDF File for CompTIA N10-006 Real Exam

Instant Access to Free VCE Files: CompTIA | VMware | SAP …
Instant Access to Free PDF Files: CompTIA | VMware | SAP …