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Chapter 1 - Intro to Networks and Networking concepts.
Objectives:
1. Understand basic networked communications and services
2. Identify essential network components
3. Describe the benefits of networking
4. Understand and compare peer-to peer and server-based networks.
5. Apply your knowledge when selecting an appropriate network type for small
business use
6. Suggest possible redesigns for a small but expanding network.
Important Points:
1. Networking involves the connecting of computers to share knowledge and
devices (printer, faxes, modem, etc.)
2. LAN - local area network - single collection of networked machines.
3. Ethernet most often used protocol for networks.
4. WAN - wide area network spans distances in miles and links two or more LANS.
5. MAN - metropolitan area network.
6. Internet - WAN internet work that includes hundreds of thousands to millions
of machines.
7. Server - a computer that share its resources across the network.
8. Client - computer that accesses shared resources.
9. Request-response - client request information- server responds
10. Client/Server relationship
a. Centralized user accounts, security, and access controls
simplify network admin.
b. More efficient access to network resources.
c. Single password delivers access to all resources.
d. Good for ten or more users.
11. Peer to Peer- share and request resources from each other.
a. easy to install and configure.
b. No dependence on the presence of dedicated server
c. Users control their own shared resources
d. inexpensive to purchase and operate
e. No additional equipment or software beyond a NOS.
f. No administrator required.
g. Good for less than ten machines.
12. NIC - network interface card
13. Network protocols - agreed upon rules Network Operating System NOS
14. Storage area network - SAN uses high-speed network links between servers
that may be located anywhere in an enterprise and centralized storage systems.
a. Sideband link is applied to the connection between SAN and
servers.
15. Wireless Personal Area Networks (WPANs) - short-range network used for transmitting
signals. cell phones, pagers, PDA/s, watches.
16. Hybrid networks - combination networks -
17. Application servers - supply the server side of client/server applications.
18. Communication servers - provide access to networks - Romote routing and
Access Server(RRAS).
19. domain controller or directory servers handles the logon services and
manages the users and resources.
20. Fax Servers manage fax traffic for a network.
21. File and print servers files storage, retrieval, and printers.
22. Mail Servers handle e-mal message. Exchange Server
23. Web Servers - IIS-TCP/IP, FTP
24. Web Based Networks - internet
25. .Net deliver information, deliver application, allow application
to communicate and share data.
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