Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł...
-
Upload
randolph-melton -
Category
Documents
-
view
293 -
download
0
Transcript of Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł...
![Page 1: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/1.jpg)
Computer networks
Internet, Intranet, Extranet, Lan, Wan, characteristics and differences.
Paweł Madera
![Page 2: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/2.jpg)
Table of Content
1. Generally about Computer Network2. Network Classification3. Types of Networks4. Network Hardware Componenets5. Local Area Network (LAN)
1.Ethernet2.Star Topology3.Mesh networking4.Wireless Network: Wi-Fi
6. Wide area network
![Page 3: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/3.jpg)
Table of Content
1. Internet1.TCP Protocol2.Packet/Switching3.Client/Server Networking4.Internet Functions
2. Intranet3. Extranet4. LAN & WAN comparison5. Intranet & Extranet comparison
![Page 4: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/4.jpg)
Generally about Computer Network…• group of interconnected computers• allows computers to communicate • share resources and information
![Page 5: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/5.jpg)
Network Classification
![Page 6: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/6.jpg)
Types of Networks
![Page 7: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/7.jpg)
Network Hardware Componenets
![Page 8: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/8.jpg)
Local Area Network (LAN)
• small geographic area (e.g. room, office)• contrast to wide-area networks (WANs)• controlled by one administrative authority• usually high speed• always shared
![Page 9: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/9.jpg)
Ethernet
• developed by Xerox in 1973–1975• standardized as IEEE 802.3• has replaced token ring, FDDI and ARCNET• usually uses twisted pair cable ( RJ-45)
![Page 10: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/10.jpg)
Star Topology
• one of the most common• hub accepts data from a sender and delivers it to the
receiver• reduces the chance of failure by connecting to a central
node• good performance - passing the Data through
unnecessary nodes is prevented
![Page 11: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/11.jpg)
Mesh networking
• continuous connections around blocked paths by “hopping” from node to node until the destination is reached.
• can still operate even when a node breaks down• Wi-Fi mesh is typical
![Page 12: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/12.jpg)
Wireless Network: Wi-Fi
• cheap networking solution• radio waves instead of cables• three standards :• 802.11a, 802.11b and 802.11g• 2 modes – Infrastructure, and Ad-hoc• Hotspots – easy internet access
![Page 13: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/13.jpg)
Wide Area Network (WAN)
• computer network that covers a broad area• crosses metropolitan, regional, or national
boundaries• uses routers and public communications links• Example: Internet
![Page 14: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/14.jpg)
Wide Area Network (WAN)
• used to connect LANs and other types of networks together
• Option for WAN connectivity1. Leased Line2. Circuit switching3. Packet switching4. Cell relay
• Speed from 1200 bits/s to 6 Mbit/s
![Page 15: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/15.jpg)
Wide Area Network (WAN)
• Turning into VPN to interconnect their networks, in that way
![Page 16: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/16.jpg)
Internet
• Vision Appeared first in a 1946 comic science-fiction story “A Logic Named Joe”
• SAGE program connecting, radar systems• On August 6, 1991, CERN, straddled the
border between France and Switzerland• During the 1990s, it was estimated grew
by 100% per year, with boom in 1996 and 1997
![Page 17: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/17.jpg)
Internet
• global system of interconnected computer networks
• consists of millions of private and public networks
![Page 18: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/18.jpg)
TCP Protocol
• TCP= Transmission Control Protocol• Developed by US Department of Defense in 70s• Set of network rules• 4 layers structure
![Page 19: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/19.jpg)
IP protocol
• provides addressing for computers• IP Version 4 is the initial version• ~4.3 billion (109) Internet hosts• IP v6 provides vastly larger addressing
capabilities• IPv6 will be not compatible with IPv4
![Page 20: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/20.jpg)
Packet/Switching
• Slicing digital message into packets (parcels)
• Size of a packet = 128 bytes (X.25)
• Security of the data
![Page 21: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/21.jpg)
Client/Server Networking
• Model of networking• Balanced architecture• one or more Server
Computers• Example: Internet
![Page 22: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/22.jpg)
Internet Functions
• E-mail• File-sharing• Instant messaging• Internet fax• World Wide Web• Voice over IP• Mobile VoIP
![Page 23: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/23.jpg)
Intranet
• Private computer network• secure sharing organization's information or operational
systems with its employees.• The same architecture as in Internet• private version of the Internet
![Page 24: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/24.jpg)
Intranet
• possible access to the Internet, then geteway with firewall is applied
• Intranet delivers1. tools and applications, 2. collaboration (to facilitate working in groups and teleconferencing)3. sophisticated corporate directories4. sales and Customer relationship management tools 5. project management etc
• In large intranets, traffic is often similar to public website traffic
![Page 25: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/25.jpg)
Extranet
• Uses Internet protocols, network connectivity• Share informations as intranet• The number of clients is extended to people
outside the company• interconnections are over a shared network
rather than through dedicated physical lines as in intranet
![Page 26: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/26.jpg)
LAN & WAN comparison
LAN WAN
• Small area covered• Use public communication links• Usually low speed• Uses Wi-Fi, Ethernet cables
• Large area area covered• Use public communication links• Usually fast speed• Uses optic wires, microwaves,
satellites
![Page 27: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/27.jpg)
Intranet and Extranet comparison
Intranet Extranet
• connects users in company
• shared network• single company's
administrator• Don’t need so much
security
• connects user inside and outside company
• Dedicated physical lines• multiple company's
administrator• Requires more securtity
![Page 28: Computer networks Internet, Intranet, Extranet, Lan, Wan, characteristics and differences. Paweł Madera.](https://reader033.fdocuments.us/reader033/viewer/2022061507/56649da05503460f94a8af99/html5/thumbnails/28.jpg)
The End