dza + osi   7

OSI
Without any further ado, I'll present the layers of the full-blown model. Remember this for network class exams:

Application
Presentation
Session
Transport
Network
Data Link
Physical

The Physical Layer is the hardware (serial, Ethernet, etc.). The Application Layer is just about as far from the physical layer as you can imagine—it's the place where users interact with the network.

Now, this model is so general you could probably use it as an automobile repair guide if you really wanted to. A layered model more consistent with Unix might be:

Application Layer (telnet, ftp, etc.)
Host-to-Host Transport Layer (TCP, UDP)
Internet Layer (IP and routing)
Network Access Layer (Ethernet, wi-fi, or whatever)
osi  unix  from notes
march 2012 by dza
Cisco - Accessing the WAN - 2.2.2 PPP Layered Architecture #1
A layered architecture is a logical model, design, or blueprint that aids in communication between interconnecting layers. The figure maps the layered architecture of PPP against the Open System Interconnection (OSI) model. PPP and OSI share the same Physical layer, but PPP distributes the functions of LCP and NCP differently.

At the Physical layer, you can configure PPP on a range of interfaces, including:

Asynchronous serial
Synchronous serial
HSSI
ISDN
cisco  network  networking  chapter2  chap2  serial  ppp  osi  lcp  ncp  asynchronous  synchronous  hssi  isdn  dte  dce  rs232c  rs-232-c  rs422  rs-422  rs-423  rs423  v.35  from notes
january 2011 by dza
Debian Linux Networking and Network Tutorial On How To Set up A Linux Network
A long in-depth guide of setting up a Linux network as well as a few Windows tips also, the guide is great for a basic understanding of a network and is well-written, interesting read.
network  networking  tcpip  tcp  ip  osi  subnet  sysadmin  tutorial  howto  guide  unix  linux  address  adresses  broadcast  wire  wired  route  nic  eth0  eth  ethernet  tcp/ip  debian  arp  dns  cache  routing  mac  mac-address  mac-addresses 
september 2008 by dza
Warriors of the Net
A funny 3D animation movie about how the Internet and networks work. Used in Cisco Academy as well. there is one outright error in the video. About 5 minutes in, the statement is made "What happens when Mr. IP doesn't receive an acknowledgement, he simply sends a replacement packet." As you will find out in later chapters, this is not a function of the Layer 3 Internet Protocol, which is an "unreliable", best effort delivery protocol, but rather a function of the Transport Layer TCP Protocol.
network  net  networks  osi  layers  warriors  warrior  of  the  ip  tcp/ip  tcp  tcp-ip  guide  howto  tutorial  video  technology  documentary  learn  learning  education  school  edu  skole  packet  packets  router  firewall  gateway  internet 
september 2008 by dza

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