Understanding networking and wifi?

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Hi guys,

Electronics student wanting to know more about networking etc.. just been trying to get involved with the raspberry pI and understanding Linux

I've been seeing a lot of words such as IP, Static IP, DNS, VPN, Gateway, TCP, Subnet, SSH.

I'm aware that the IP is essentially the identity of

Hi guys,

Electronics student wanting to know more about networking etc.. just been trying to get involved with the raspberry pI and understanding Linux

I've been seeing a lot of words such as IP, Static IP, DNS, VPN, Gateway, TCP, Subnet, SSH.

I'm aware that the IP is essentially the identity of the computer but the rest I'm pretty stuck with. I've been online but struggled to make sense of these. If anyone could give me a brief explanation I would appreciate it or a good link for beginners.

Thank you.

Other answer:

Loz:
ok lets start off…
1. IP is essentially the "phone" number of your computer, it can change but your computer does not change
2. the MAC address is a physical hardware address of the computer and cant change this is like the mailing address of your computer it cant change
3. IP addresses are normally assigned by a DHCP server, it automatically assigns the address if the computer is on the same subnet
4. Static IP address are ones that are manually assigned by a user of the computer
5. a DNS is a server on the internet or the local network that converts IP addresses into URLs
6. a VPN is a virtual private network. basically it tunnels through the network you are in to a different network.
7. a Gateway is the "exit point" of a network its where all traffic on that network must go to get outside that network
8. TCP is one of the 2 main IP protocols and its most commonly used. just google it for more information (it would take too long to explain it)
9. Subnets and subnet addresses are used to tell the computer what part of the IP address should be used to identify the network vs the hosts. so a subnet mask of 255.255.0.0 on the 192.168.20.1 network would tell the computer that the network is 192.168.x.x and the hosts can range from x.x.0.2 to x.x.255.255
10. Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network
David E:
IP is a method of routing packets of data from one computer to another over a network of networks.

Static IP, your address doesn t change. This cost more. Necessary if you want to host a server
DNS, Domain Name System. Turns answers.yahoo.com into IP addresses. The phone book of the internet
VPN, Virtual Private Network. Encrypted. It puts your remote computer on a network as though it were there.
Gateway. The router that connects a network to the internet. Your home router
TCP. Transmission Control Protocol. Believe it or not, IP doesn t care on iota if your packet makes it to the destination. That is TCP s job.

Subnet. Breaking a larger network into segments.
SSH, secure shell. Gives you a command line securely and remotely.

Take a course on it. Electricals that understand this is needed and can get you a decent income.

Richard:
IP – Internet Protocol – This is the main protocol in a set of protocols that define communication across a network and between networks.

IP Address is a unique address within a set of networks that defines a specific connection point within the networks. This might be a specific computer or a single other device. With a NAT router, as used by most home users, the single device (router) provides the mapping and conversion of the IP address into other IP addresses. This allows multiple computers within your home to share a single public IP address. There are several blocks of IP addresses that are reserved for private use and are not allowed on the Internet. A NAT router uses addresses in these blocks for private networks carrying multiple devices that are sharing a public (Internet allowed) IP address.

Static Address, Reserved Address, Dynamic Address. A computer (or other device) may either be configured with all the addresses (its own IP, gateway and DNS server addresses) and the network mask specifically set within the computer, or the addresses and mask may be supplied to the computer by a DHCP server attached to the same subnet. Addresses that are specifically set in the computer are static addresses. Addresses that are loaded into the computer by DHCP are dynamic addresses. A reserved address occurs when the DHCP server is configured always to assign the same address to a specific computer. When an ISP assigns a "static" address to its customers, the ISP's DHCP service reserves a specific address for each customer, but the customer's equipment gets its public address as a dynamic address but is always assigned the same address.

DNS – Domain Name Server – provides a directory service to look up public IP addresses (such as 98.139.199.204) from the Domain name (answers.yahoo.com). If a website moves to a different server with a different public IP address, it can keep the same domain name.

VPN – Virtual Private Network – provides a secure connection between two end points. One endpoint might be in your computer, and the other end point might be in a corporate gateway server or a proxy server.

Gateway – A router that provides a connection to a different subnet.

TCP – Transmission Control Protocol – one of the core protocols that form the Internet Protocol set of protocols. UDP – User Datagram Protocol – is another core protocol. TCP provides end to end verification of safe delivery, while UDP is much simpler and is a send and forget protocol. Higher levels such as the final application can validate for safe delivery of UDP packets.

Subnet – a group of addresses that can access each other directly without needing to go through a gateway.

SSH – Secure Shell – a protocol used to execute shell commands on a remote computer securely.

If you want to read further about these and other related protocols, network architectures and WiFi I suggest you go to http://en.wikipedia.com and search for the topics you require.

I hope this helps.

Tracy L:
There are hundreds of good sights to start learning from, try a couple of these
https://www.digitalocean.com/community/t…
http://www.howtogeek.com/191139/22-commo…
http://computerguru.net/networking
http://www.techsoup.org/support/articles-and-how-tos/networking-101-concepts-and-definitions

Most of what you asked is covered by basic networking.
An IP is an internet address not a computer ID. IP's can change and will, if you connect at McDonalds it will not be the same as you Home IP and your Home Ip will change when your ISP wants it to change or needs it to change.

Roberts:
IP is not the identity of the computer! That MIGHT be a MAC address, but not IP (Internet Protocol) and not an IP address.
?:
There is not enough space here to tell you enough to be useful. Try the book "Networking for Dummies", it contains the most detailed description I have seen anywhere.
chrisjbsc:
IP is not the identity of the computer! That MIGHT be a MAC address, but not IP (Internet Protocol) and not an IP address.

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