Nelson Information Technology VCE Units 1 & 2
Test your knowledge answers
Chapter 2: Networks
Communications
1 Describe the difference between an analog signal and a digital signal.
A-1 An analog or analogue signal is any continuous signal for which the time varying feature (variable) and A digital signal is a physical signal that is a representation of a sequence
2 What is the function of a dial-up modem?
A-2 Access a computer system or service remotely
Networks
3 What is a network? How is a local area network (LAN) different from a wide area network (WAN)?
A-3 A computer network is a network which allows computer to exchange data. A lan only covers small areas like schools, café, offices whereas WAN covers large geographical areas like
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A-11 Star topology is one of the most common network setups. In this setup all nodes are connected to the central server or computer and server and it also looks like a star.
12 What is an intranet? What benefits to organizations are there is setting up an Intranet?
A-12 An intranet is a computer network that uses Internet Protocol technology to share information. Intranets restrict access to company information and facilities to employees.
13 Why do manufacturers of network hardware and software follow established Standards?
A-13 Standards allow manufactures the combination of products from different manufacturers to create a customized system whereas without standards, only hardware and software’s from the same company could be used together.
14 Briefly describe how an Ethernet network transmits data.
A-14 Ethernet networks use cables to transmit data. When a workstation on an Ethernet network wishes to transmit, it checks the network to see if it is not busy and the broadcasts a packet. If the packet is addressed to workstation #15, only workstation #15 will read it. If two workstations simultaneously check the network, find it is not busy and send packets at the same time, a collision occurs. When collision occurs a special signal travels over the network to indicate that it is ‘jammed’.
15 In what situations would the TCP/IP protocol be most useful?
A-15
16 Explain the term packet switching.
A-16 A mode of data transmission in which a
4)LAN (Local Area Network)-A LAN is a group of computers or devices connected together through a local network.LAN connections are usually very inexpensive.They are also usually very fast.LAN connections are usually within the same building.
2. What is the difference between a WAN and a LAN? Which type of network is the Internet? Which type of network is the classroom network?
In the early years of the internet, large scaled groups of computer were a bit of an issue, it was a pain to manage computers in respects to the communication between all the clients inside that group. Not only was it inevitable that businesses would require many more computers in their offices but it was also inevitable that the demand for this was going to increase both in and out of the work place. Initially the main driving at the time for Local area networking was so that people in the same
A LAN is a ‘Local Area Network’. It is a small network of computers most often
When setting up a LAN the architecture that you decide to choose is important. There are several factors that are decided when choosing said architecture, some of these being network speeds, types of cables, and access control mechanisms like collision detection (Team, 2011). The most common on in today’s LANs is Ethernet. These can be either wireless, wired, or a hybrid of both.
A LAN networks job is to link computers together through a central device. That central device is the router, it is what transfers data to and from computers with an Ethernet cable or wirelessly as long as you are connected to the network. When you connect to the internet you are actually connecting to millions of networks that are connect through a multitude of ways: telephone lines, cable, and even fiber optic lines. A LAN and the Internet are the same only in the way that they both need a router to, well, route traffic. You actually can incorporate the Internet access into a LAN. The modem must be connected to the router and then that will provide a gateway between the Internet and the network connection. A firewall is very important
It is generally limited to a geographic area such as a writing lab, school, or building. Rarely are LAN computers more than a mile apart. In a typical LAN configuration, one computer is designated as the file server. It stores all of the software that controls the network, as well as the software that can be shared by the computers attached to the network. Computers connected to the file server are called workstations. The workstations can be less powerful than the file server, and they may have additional software on their hard drives. On many LANs, cables are used to connect the network interface cards in each computer; other LANs may be wireless.
Computer Network: A LAN (local area network) that connects computers in a house, at school or at work.
• A failure in any cable or device breaks the loop and can take down the
Networking communication, such as the intranet and Internet, provides a collaboration platform that allows business employees to share and edit documents and projects across the organization. Successfully introducing these components into the widget company will make business a lot easier to manage and will help increase productivity.
An intranet is a computer network that uses Internet Protocol technology to securely share any part of an organization's information or network operating system within that organization. The term is used in contrast to internet, a network between organizations, and instead refers to a network within an organization. Sometimes the term refers only to the organization's internal website, but may be a more extensive part of the organization's information technology infrastructure. Organizations often use internet technologies to facilitate operations within the organization. Such systems might also include product support knowledge bases, training systems, and access to the organization's benefits system.
A LAN is a network of computers in a specific area interconnect using a variety of network media. For example, WBHS LAN are all the computers connected to the WBHS network via Ethernet, Wi-fi or other. This is different from a WAN (Wide area network) which extends to a much wider area such as a town, city and country. LAN are usually more restricted in access and more numerous.
LAN stands for Local Area Network. It is a type of network that covers a greater distance and it interconnects computers and devices either wired or wireless. LAN is mainly used in private organisations such as college or university. More or less everyone uses wireless router at home these days and the user is able to connect between 5-10 devices wirelessly. The user can share the broadband or the connection with ADSL by using Ethernet cables. Smaller LANs can connect at least 2-3 computers using one cable. It also depends on the size of the organisation. Smaller LANs are easier to manage. The users need to be careful when using larger LANs and need to make sure that the network within it is transmitted efficiently. The user can increase the number of computers connected by using routers and switches. This ensures that the network administrator has higher level of control over the network. IEEE 802.3 is the wired Ethernet used by LAN and therefore it is related to LAN. The set up cost for LAN is relatively cheap.
A computer network is a network that consist of two or more computers that are able to share information between them or their users. There are a large variety of different networks and the advantages or disadvantages are strongly related to the type of network we choose.
One of the best ways to share information between the employees of a company is with an intranet. Whether this information is shared from the company or among the employees themselves, access to it is crucial to the overall success of the company.