Ensurepass

 

QUESTION 71

An administrator needs to install a WAP in a location where there is no electrical wiring. Which of the following should the administrator use to complete a successful installation?

 

A.

Coaxial

B.

Wireless bridge

C.

PoE

D.

Multimode fiber

 

Correct Answer: C

Explanation:

PoE provides both data and power connections in one cable, so equipment doesn’t require a separate cable for each need.

 

 

QUESTION 72

In contrast to earlier Wi-Fi speeds, which of the following BEST describes the antenna and channelization properties used in 802.11n?

 

A.

MIMO, DSSS

B.

MIMO, OFDM

C.

CSMA, DSSS

D.

CSMA, CDMA

 

Correct Answer: B

Explanation:

802.11n builds upon previous 802.11 standards by adding multiple-input multiple-output (MIMO). The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range by exploiting the spatial diversity through coding schemes like Alamouti coding. The speed is 150 Mbit/s (even 250 Mbit/s in PHY level)< /font>

 

 

QUESTION 73

The network administrator installed a new dipole antenna that extends 100 feet (30.48 meters) from the existing AP. All components are correct, functional, and installed properly. However, during validation, there is a very weak signal coming from the antenna. Which of the following is the MOST likely cause of the issue?

 

A.

The installation exceeds the link limitations

B.

The antenna is mounted for vertical polarization

C.

The dBi output of the antenna is too low

D.

The radio is too powerful for the installation

 

Correct Answer: A

Explanation:

Unlike isotropic antennas, dipole antennas are real antennas. Dipole antennas have a different radiation pattern compared to isotropic antennas. The dipole radiation pattern is 360 degrees in the horizontal plane and 75 degrees in the vertical plane (assuming the dipole antenna is standing vertically) and resembles a donut in shape. Because the beam is “slightly” concentrated, dipole antennas have a gain over isotropic antennas of 2.14 dB in the horizontal plane. Dipole antennas are said to have a gain of 2.14 dBi (in comparison to an isotropic antenna).

 

 

QUESTION 74

Which of the following performance benefits would multiple domain controllers BEST provide?

 

A.

Fault tolerance

B.

Caching engine

C.

Proxy server

D.

Quality of service

 

Correct Answer: A< /span>

Explanation:

Fault-tolerant design is a design that enables a system to continue its intended operation, possibly at a reduced level, rather than failing completely, when some part of the system fails. The term is most commonly used to describe computer-based systems designed to continue more or less fully operational with, perhaps, a reduction in throughput or an increase in response time in the event of some partial failure

 

 

QUESTION 75

Which of the following protocols is MOST commonly associated with VoIP?

 

A.

LDAP

B.

HTTPS

C.

SIP

D.

SCP

 

Correct Answer: C

Explanation:

The Session Initiation Protocol (SIP) is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks.

 

 

QUESTION 76

Which of the following would a technician do to monitor remote traffic through an access point?

 

A.

Enable an SNMP agent

B.

Enable network mapping

C.

Set monitoring SSID

D.

Select WPA2

 

Correct Answer: A

Explanation:

Large networks with hundreds or thousands of nodes are difficult to manage without a large staff to monitor every computer. SNMP, which is widely used in local area networks (LANs), lets you monitor network nodes from a management host. You can monitor network devices such as servers, workstations, printers, routers, bridges, and hubs, as well as services such as Dynamic Host Configuration Protocol (DHCP) or Windows Internet Name Service (WINS).

 

 

QUESTION 77

Some visitors are unable to access the wireless network. The network’s wireless infrastructure is comprised of three different buildings with the configurations listed below. Wireless network in Building A and C is used exclusively for internal employees and Building B is used for visitors and requires no additional configuration on their devices. Which of the following settings would need to be modified to provide wireless access to all visitors?

 

Building A Building B Building C

Channel: 2 Channel: 6 Channel: 11

Encryption: WPA2 Encryption: WPA2 Encryption: WPA2

 

A.

Encryption set to Open in all Buildings

B.

Encryption set to Open in Building B

C.

Encryption set to WEP in Building B

D.

Channel set to 11 in Building B

 

Correct Answer: B

Explanation:

Because the building B is in the middle, the wireless access router will have reachability to the building A and C.Now, the only thing that we need to do is to open the Wireless access on B for the guest users for the WAP in B so that the users coming to building A and C can get access to internet using the open connection.

 

 

QUESTION 78

A proxy server would MOST likely be installed to provide which of the following functions? (Select TWO).

 

A.

Combined DNS and DHCP hosting

B.

Encryption

C.

Content filtering

D.

Fault tolerance

E.

Website caching

 

Correct Answer: CE

Explanation:

A content-filtering web proxy server provides administrative control over the content that may be relayed in one or both directions through the proxy. A caching proxy server accelerates service requests by retrieving content saved from a previous request made by the same client or even other clients.

 

 

 

 

 

 

QUESTION 79

A small business owner is setting up a SOHO office. The business owner needs one device that will allow for Internet access, trunk VLANs, translate multiple private IP addresses into public IP addresses, and filter packets. Which of the following network devices will allow for all functions?

 

A.

A VPN concentrator

B.

A switch

C.

A router

D.

A firewall

 

Correct Answer: C

Explanation:

A router is a device which is capable of performing entire task required by the business owner.

 

 

QUESTION 80

Which of the following networking devices can exist at several layers of the OSI model at the same time? (Select TWO).

 

A.

Switch

B.

Cable

C.

Repeater

D.

Router

E.

Bridge

F.

Hub

 

Correct Answer: AD

Explanation:

A Multilayer Switch and Router work from OSI layer 2, 3 or 4 to IP DSCP (if IP packet) and/or VLAN IEEE 802.1p.

 

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