Network 1001

What is the most common central device used today to connect computers to a network?

• hub

• switch

• SOHO router

• VPN Router

Answer explanation

Hubs are considered legacy devices and have been replaced by switches. Switches allow multiple computers to connect together. The advantage of a switch over a hub is that it can handle several conversations at the same time.

What is the most common adapter or connector used to connect a computer to a wired network?

• RG6

• RG58

• RJ45

• RJ8

Answer explanation

RJ-45, which is associated with Ethernet networks, is the most common wired adapter by default and is found on virtually every computer these days.

Which of the following does a switch use for increased performance?

• simplex

• half duplex

• full duplex

• sliding duplex

Answer explanation

A switch switches very fast between multiple connections, which allow multiple computers to communicate at the same time. As a result, each client can send and receive at the same time (full duplex), which gives better performance.

What do you use to isolate a group of computers within your organization?

• WLAN

• WAN

• VLAN

• Internet

Answer explanation

A virtual LAN (VLAN) is a group of hosts with a common set of requirements that communicate as though they were connected together as normal on one switch, regardless of their physical location. A VLAN is implemented to segment a network, reduce collisions, organize the network, boost performance, and increase security.

What do you use to create VLANs

• router

• switch

• firewall

• proxy server

Answer explanation

Switches usually control the VLAN. Like subnetting, a VLAN compartmentalizes a network and can isolate traffic.

What zone is used to publish external websites for an organization?

• intranet

• extranet

• internetwork

• DMZ

Answer explanation

A perimeter network (also known as a demilitarized zone or DMZ) is a small network that is set up separately from a company’s private LAN and the Internet. It is called a perimeter network because it is usually on the edge of the LAN,

A machine receives an IP address starting with 169.254.x.x when which of the following occurs?

• When the machine is using IPv6

• When the next IP range begins with 169.253

• When the DHCP server does not respond

• When the operating system is Unix or Linux

Answer explanation

169.254.x.x means that the computer has assigned itself an Automatic Private IP Address. APIPA

A technician is connecting a PoE enabled phone and needs to run the drop from the switch that is 55 meters (180.4 feet) away. Which of the following cable types would be the MOST suitable for this purpose?

• Fiber

• Coaxial

• CAT3

• CAT6

Answer explanation

If you have the problem of needing to get power where your network cabling has

gone, you can use Power over Ethernet (PoE), a feature that might be available on high-end

wired network adapters to allow power to be transmitted over Ethernet cable. Using this

feature, you can place a wireless access point, webcam, IP phone, or other device that needs

power in a position in a building where you don’t have an electrical outlet. The Ethernet cable to the device

provides both power and data transmissions.

Which of the following is an advantage of using DHCP for network addressing?

• Simplified configuration

• More addresses are available

• Faster connection speeds

• Lower latency times

Answer explanation

DHCP allows for simple IP Configuration

The device that allows two different networks to communicate with one another is:

• Switch

• Bridge

• Hub

• Access point

Answer explanation

 A

bridge stands between two network segments and controls traffic between them.