Chapter 4 Gray pages 68 - 79 Exercise 4-4, 4-5, 4-7, 4-8, 4-10, 4-11, 4-12

Network Questions Exercise 4-4
1. Server - C. A computer which is in charge of certain tasks on a network, or which is used to share things with other computers on the network.
2. Client - A. A computer which connects to a network and uses the resources the network has.
3. LAN - B. A network within a small area, such as an office building or a shopping mall.
4. WAN - E. A network spread over several countries and continents. The Internet is an example.
5. Router - D. A device used to connect a LAN network to the Internet.
6. Hub - F. A device used to connect computers to each other on a LAN.
7. Switch - G. A more advanced version of a hub.
8. ISP - L. A company that gives access to the Internet.
9. Shared devices - K. Items like printers that can be used by many different people on the network.
10. Ethernet - H. This is the type of cable used to connect most computers to a network.
11. Wi-Fi - I. The most common way of connecting computers to a network wireless.
12. Workstation - J. Another name for a client computer.

Exercise 4-5
1. A 400KB image over a dialup connection. Dailup Speed = 56Kbps

Start with 400KB X 8bits/1B X 1 sec/56Kb = 57 seconds

2. A 300MB software download on a 1Mbps cable connection - there is a typo in the book, speed is not measured in MB, instead it would be 1Mbps

Start with 300MB X 8bits/1B X 1 sec/1Mb = 2,400 seconds or 40 minutes.

Here is the answer with the typo Start with 300MB X 1 sec/1MB = 300 seconds or 5 minutes.

Exercise 4-7
In order to setup a home network for a desktop, two laptops and two mobile devices the family will need to contact an Internet Service Provider who will come to the home and make a physical connection from the home to the ISP. This will involve the installation and configuration of a Modem/Router/Wireless hub in the house. Since this device will provide a wireless network no cables are needed but the desktop may need an ethernet patch cord or if it has a wireless NIC then no cable would be needed. No new software would be needed but the computers would need to be configured to be part of the network.

Exercise 4-8
An acceptable use policy that a company might employ for their user might include the following provisions:
1. Networks are to be use for company business only - no music streaming, tweeting, downloading.
2. User passwords and accounts are to be secured at all times, only company employees may access the network.
3. All company communications will follow the rules of netiquite
4. Only company hardware is to be connected to the network. Home phones and devices are not allowed on the network

Exercise 4-10
Network hardware components might include: CAT5 cable, NIC, Switch, Router or Modem
A thin client is a diskless workstation, it has no hard drive and thus does not permanently store data. It must have a network connection in order to operate.
Network adminstrators can apply a series of roles to users on the network that limit their access. When the user logs into the network they are only provided with specific access to specific devices. The network may also be divided into subnetworks and access to those subnetworks can be controlled by the administrator.

Exercise 4-11
1. Two units used to measure network speed are bits and seconds, common units are Kbps, Mbps or Gbps
2. A Metropolitan Area Network is a network that is larger than a LAN but smaller than a WAN. The term is applied to the interconnection of networks in a city into a single larger network (which may then also offer efficient connection to a wide area network). It is also used to mean the interconnection of several local area networks by bridging them with backbone lines. The latter usage is also sometimes referred to as a campus network.
3. Computers on a network are identified by the following:
A - IP address - primary means of identification
B. - Computer Name
C. - MAC address

Exercise 4-12
a. Hardware address is another term for an IP address - false
b. An IP address can uniquely identify any computer in the world - true
c. A modem is needed for all connections to the Internet - false
d. Fiber optic cables are one of the fastest types of network connections - true
e. Local Area Networks always have at least one server - false
f. Data transmitted over the Internet travels through several hosts before reaching its destination - true
g. Network switches are used to connect several networks together - false
h. A peer to peer network has no centralized server - true
i. Servers perform jobs including user authentication - true