Networking

DSL

Digital Subscriber Line (DSL) is limited to 10,000 feet from the central office for communication and can make use of existing phone lines already in place at your home or business.

A network that connects two cities would commonly be known as a ____ network?

Wide Area

Wide Area

Wide Area Networks, also known as WAN, are networks that are connected across long distances, such as city to city or state to state.

After running 100 ethernet cables for your new office, you find that one of the computers you connected them to is showing as if there is nothing connected. You need to find where the other end connects in the data closet, but you forgot to label the cables. What could you use to help you find the other end of the cable?

toner probe (By plugging in a tone generator at the jack of one end of the cable, you can find the other end by waving a toner probe around the area you think it could be. A loud tone noise will generate when you have found the end of the cable.)

LDAP (Lightweight Directory Access Protocol) often works in conjunction with Active Directory to provide user authentication and management in a network. It is the successor to the DAP (Directory Access Protocol).

802.11a

802.11a

802.11a is not in use much in modern times, but it did offer exceptional speeds in the 5 GHz frequency band, at the cost of a smaller range of coverage than some of the other standards.

crimper

A connector is typically crimped as the last step in the process after creating an ethernet cable. This securely tightens down the wiring to the correct spots inside the connector for electrical signals to pass.

repeater

A repeater can re-send the wireless signal into an area that is not covered by the original access point. This would be a good alternative option to buying another access point and can easily repeat the signal onto another floor of a home.

Where could you put a server that should be publicly accessible from the Internet, but should be segmented from the rest of your internal network?

DMZ (By creating a DMZ (demilitarized zone), you are setting up a subnet of your network that is accessible to outside users typically Internet traffic. A DMZ makes certain services available to external users while denying access to the rest of your network. Services typically segmented by a DMZ could include: email servers, Web servers, and FTP servers.)

Which Internet connection type is limited to an area near the central office and can make use of existing wiring infrastructure?

DSL

Hannah's new clothing business is experiencing rapid growth, and she has planned to open 300 new retail locations within the next 5 years. All of these locations will need multiple public IP addresses per store, but, currently, they only have four public addresses. She would like to implement a new scheme, where she would not have to worry about being limited by IP addresses in the foreseeable future. What addressing scheme would you recommend?

IPv6 addressing

What type of technology supports the use of signaling and bearer channels?

ISDN

ISDN

ISDN (Integrated Services Digital Network) uses bearer (B) channels to send data and uses D channels for signaling and control.

In a Windows environment, this protocol is often associated with Active Directory for central management of a user database. What is this protocol called?

LDAP

LDAP

LDAP (Lightweight Directory Access Protocol) often works in conjunction with Active Directory to provide user authentication and management in a network. It is the successor to the DAP (Directory Access Protocol).

Switches that are configured to participate in routing decisions are commonly known as what?

Layer 3 switch

A customer needs help selecting the proper network cabling to run in their store. The distance will be less than 200 feet and the cable should not be prone to electrical interference. Which type of cabling would you suggest?

MMF

MMF

Multi-Mode Fiber. MMF is considerably less expensive than SMF (Single-Mode) fiber cable.

In order for devices on our local home network to communicate with other devices on the Internet, our SOHO router must perform what?

NAT

NAT

NAT (Network Address Translation) allows our private local network IP addresses to be translated into a public IP address capable of connecting over the Internet.

A network of devices used in your car, such as a connecting your cell phone to the car via Bluetooth, is known as what kind of network?

PAN

PAN

PAN (Personal Area Networks ) are networks designed just for you, typically in a very short range. Connecting your cell phone to your car via Bluetooth, or connecting a set of Bluetooth speakers to your cell phone, would both qualify as a PAN

Which sets of connectors are used for twisted pair cabling?

RJ11 and RJ45 (RJ11 and RJ45 are used in twisted pair cabling, commonly for phone lines and ethernet, respectively.)

Which type fiber connector most closely resembles a BNC connector?

ST ( The Straight Tip connector contains a bayonet connection, similar to the one used on BNC connectors.)

David is installing a new Web server at the office, but doesn't want DHCP giving it a new IP address every time he has to reboot it during maintenance. What kind of address should David assign to the new Web server?

Static

Static Addresses

Static addresses are those that are manually assigned and entered on a device. This will effectively disable DHCP. He should also reserve the IP address in the DHCP pool as good practice, to prevent it from being leased to another device.

WPA2-Enterprise

This is an enterprise grade solution built off of WPA2 encryption. This disables shared wireless access using one password and requires each user to use unique credentials for access.

Sally is at her business office, in a remote area in town, when suddenly her laptop loses Internet access due to a thunderstorm. She is using satellite, so she may have to wait until the storm passes before her Internet access is restored. She has only her cell phone with her, and asks you for a temporary solution. What would you suggest?

Use the phone's tethering ability.

This type of wireless encryption is typically found in larger companies and requires each user to log in with separate credentials. What is the name of this technology?

WPA2-Enterprise

What tool would help you secure the RJ45 connector to the wiring used for an ethernet connection?

crimper

Which type of scale is used to calculate decibel signal strength or signal loss?

logarithmic ( Changes in decibel is logarithmic in nature. This means that a 20 decibel change could potentially result in a signal loss or signal strength by a factor of 1000 times that amount.)

You've just installed a wireless access point upstairs in your new home. However, when you go down into the basement, you lose your signal and can no longer surf the Internet. What type of equipment could you buy if you did not want to purchase another access point, but wanted to keep wireless connectivity?

repeater