Network Plus Book Solutions

Zone Types

Forward lookup zone and Reverse lookup zone.

When would you use CSMA/CD?

Is typically used in non-switched Ethernet LANs.

In the 10xBase standards, what does the letter or letters at the end of the standard specify?

This is an indicator of the type of medium: copper or fiber optic.

What are characteristics of directional antennas?

Used in point-to-point networks. Transmit narrow and focused beams.

Which 802.11 standard can operate at either 2.4 GHz or 5 GHz?

802.11n

Domain

A grouping of devices on the internet or on another network based on the nature of their operations.

Dynamic Record

A network node can request to add a dynamic DNS record that can change dynamically and automatically updates a name server in DNS.

Custom Subnet Masks

A number that is applied to an IP address to divide a single block of addresses into multiple subnets. Sometimes referred to as variable length subnet masks (VLSMs) Example /24, /26/

Host Names

A unique name given to a node on a TCP/IP network. They are also subsets of a domain.

Domain Name

A unique name that identifies a website on the internet. A period is used to separate the labels of domain names.

Private IP Addresses

An address used for a node that needs IP connectivity only within the enterprise network, but not external connections to the Internet.

Identify the cable types that connect devices in the classroom.

Bounded media like twisted pair cable

Which layer packages bits of data from the Physical layer into frames?

Data link

Which network type employs elements of both LANs and WANs

Enterprise network

True or False? Multimode fiber can be used in longer distances than single mode

False

A hybrid topology is a combination of the following topologies

It can be a number of topologies combined. For example, a physical ring and physical star topology.

Contoso Headquarters occupies four floors in their building. What category does this network fit into

LAN

What command outputs the routing table

Route print

You need to connect multiple networks that use the same protocol. Which networking device would best meet your needs?

Router

Which device allows you to control the home devices from a remote location using the internet?

The control hub

Why wouldn't you want to set your wireless access point to channel 3?

There is too much interference from overlapping channels. Use channels 1, 6, or 11.

Contoso has a remote office that accesses its corporate office with relatively high bandwidth. Which network category does it use?

WAN

What are some common uses for employing VLANs?

Security, Separate traffic types for QoS, Traffic management.

Benefits of subnetting

1. Conserve IP Addresses. 2. Improve network performance. 3. Provide a more secure network environment.

Convert the binary number of 10110010 to its decimal equivalent.

178

Convert the binary number of 10111011 to its decimal equivalent

187

Formula to calculate the number of available host addresses

2 the to power (n) n is the number of host bits (minus) 2

Formula to calculate the number of available network addresses

2 to the power of (a) a is the number of network bits.

At what radio frequency does bluetooth operate?

2.4 GHz

Convert the binary number of 01010001 to its decimal equivalent

81

Custom Subnets

A collection of IP Addresses that are divided into smaller groups to serve a network's needs.

FQDN

A fully qualified domain name. Written in standard dot-delimited notation. Maximum length is 255 characters and can be up to 63 characters long.

Which type of firewall would you implement at the branch office to protect multiple devices? and Why?

A hardware firewall should be implemented, because it enables you to manage firewall settings for all devices in one place.

Subnet

A logical subset of a larger network created by an administrator to improve network performance or to provide security.

Static Record

A static record is entered manually by an administrator and does not change unless the administrator manually updates it.

When would you use static routing rather than dynamic routing?

Should be used on small networks that are not likely to change.

IP Addresses

A unique binary address assigned to a device so that it can communicate with other devices on a TCP/IP network.

Default Gateways

An IP Address assigned to a router that forwards remote traffic from its local subnet to remote networks.

The network administrator says that the branch office could be experiencing a high amount of back reflection with their fiber media. Which ferrule polish would you select to reduce the back reflection the most?

Angled physical contact

Which transmission method allows data to be sent to a node, and then that node transmits the data to the next nearest node?

Anycast

In which layer do programs on a network node access network services?

Application

Which transmission method allows digital signals to be sent as DC pulses over a single, unmultiplexed signal channel?

Baseband

Why should VLANs be carefully planned before implementing them?

Because the switch will not forward frames between VLANs. If a node in one VLAN needs to communicate with a node in another VLAN, some other mechanisim (like a router) must be used to allow that communication.

True or False? With the deterministic media access method, the nodes themselves negotiate for media access time.

False

Which of the following are reasons why a plenum cable is commonly used in air handling spaces and run through firebreaks?

Fire is less likely to travel through the cable because the jacket is closely bound to the conductors.

How does VLAN tagging work?

Frames that are tagged are configured with 802.1q encapsulation. Tagged ports are used to connect network hardware devices.

Identify the types of connectors used in the classroom network.

If the cable type is twisted pair, the connectors will be RJ-45.

DNS Name Resolution Process

Step 1 Client request. Step 2 Preferred DNS Server, Step 3 Root name server.

Which forms of wireless media operate only when there are no obstacles in the transmission path?

Infrared and Microwave

When would you use CSMA/CA?

Is typically used in wireless LANs.

hostname

It gives you the name of your computer

What does the address 127.0.0.1 represent, and what is its significance?

It is the loopback address. It is used for diagnostics.

Reverse lookup zone

It returns the fully qualified domain name of a host based on its IP address.

Where would you recommend placing Wi-FI antennas for the best coverage in an office full of cubicles as well as in the warehouse?

It should be placed in a centralized area up high on the ceiling.

What are characteristics of unbounded media

It transmits both voice and data signals. It uses electromagnetic energy.

IP Addresses are divided into three levels

Network ID, Subnet ID and Host ID.

Forward lookup zone

Normal DNS queries, they request the IP address that corresponds to a fully qualified domain name.

What layer transmits bits from one device to another and regulates the transmission stream over a medium?

Physical

Which of these layer 2 network devices is commonly used to connect end user devices and network resources?

Switch

What do you need to implement VLANs beyond a single switch?

Port Trunking

Which is not a factor that can affect the performance of copper network media?

Refraction

DNS

The domain name system is a TCP/IP name resolution service that translates FQDNs into IP Addresses.

Which octets of a subnet mask is the network portion

The first 2 octets

Which octets of an IP Address is the network portion.

The first 2 octets

Which octets of a subnet mask is the host portion

The last 2 octets

Which octets of an IP Address is the host portion of an IP Address

The last 2 octets

Subnetting

The process of logically dividing a network into smaller subnetworks.

Which OSI layer is responsible for establishing connections between two devices?

Transport

True of False? Multicasting is more efficient in the use of network media than unicast transmission when many clients need to receive the same information from a server.

True

True or False? One purpose of a switch is to optimize performance by providing users with higher bandwidth for transmission.

True

What is the purpose of an SSID?

Used to Identify a WAP and all devices attached to it

Which device could you implement for processing credit cards as a backup if your broadband connection goes down? Why?

You can use an analog modem as a communication device if the broadband network is not available.

What is the advantage of using dynamic routing?

You do not need to manually update and manage routes. It is also more salable and adaptable, which can be important in large networks.

What logic topology should you use to place the sniffer next to the server, and how would you implement it?

You need to configure the server and the sniffer in a logical bus. Unplug the server from it's switch port, plug a hub in its place, and then plug both the switch and the sniffer into the hub.

DNS Components

Zones, Zone File and Records Relies on Active Directory to update the zones.