|
|
Sponsored Content
Special Forums
IP Networking
The OSI-model
Post 17837 by J.P on Wednesday 20th of March 2002 02:27:24 PM
03-20-2002
The OSI-model
after reading a paper about the OSI-model I'm not exactly sure how to look at this model.
Does data (a file) travel from the application level "down" each layer at the client
Application
V
Presentation
V
Session
V
Transport
V
Network
V
Data link
V
|
|
| (Physical)
|
|
and "up" each layer (in reverse order: physical, data link, network etc..) at the server ?
After taking a look at a picture (http://www.cs.columbia.edu/~hgs/internet/it_stack.gif)
I noticed that there seems to be no data link activity between the
network (IPv4, IPv6) and physical layer (Ethernet)..
I couldn't be more confused. Any help at all is highly appreciated
Does data (a file) travel from the application level "down" each layer at the client
Application
V
Presentation
V
Session
V
Transport
V
Network
V
Data link
V
|
|
| (Physical)
|
|
and "up" each layer (in reverse order: physical, data link, network etc..) at the server ?
After taking a look at a picture (http://www.cs.columbia.edu/~hgs/internet/it_stack.gif)
I noticed that there seems to be no data link activity between the
network (IPv4, IPv6) and physical layer (Ethernet)..
I couldn't be more confused. Any help at all is highly appreciated
|
|
7 More Discussions You Might Find Interesting
1. UNIX Desktop Questions & Answers
what is it??
I looked everywhere but cant seem to find it
also where can I get information about the difference between NFS 2 or NFS 3?? (6 Replies)
Discussion started by: TRUEST
6 Replies
2. Solaris
Dear
After i received a demo license for OSI 9.0 from SUN , i installed the packages . but when i tried to start the osinet deamon ( /etc/rc2.d/S90osinet ) i am getting the foellowing errror
# ./S90osinet start
starting osi daemon/usr/sbin/osinetd cannot find a valid license (STACK 9.0)... (4 Replies)
Discussion started by: itsgeorge
4 Replies
3. Solaris
Hi.
I get the folloing message if i try to start the osinet deamon:
# /etc/rc2.d/S90osinet start
starting osi daemonunable to unload all the osi modules
some OSI applications may be running
unable to start OSI daemon
#
Has anyone an idea what is going wrong?
Answers to mail: (Note... (1 Reply)
Discussion started by: morenqfj
1 Replies
4. Solaris
I'm using OSI version 9.0 with solaries OS , I 'm thinking of analysing the tracing while sending information through OSI layers , I want to analyze exactly the BER data ? Any one could provide an examples , I know the command for tracing these information but i need to understand the bytes travels... (1 Reply)
Discussion started by: atiato
1 Replies
5. Debian
Is there OSI telecom application which can be installed on debian similar to Solstice Solaries OSI ?
I need to get it on debian to build cmise and communicate with Network element . (0 Replies)
Discussion started by: atiato
0 Replies
6. IP Networking
Hi friends,
I hope everyone is doing fine. I have this confusion regarding the OSI model. I have been reading a book on datacommunication and networking which discusses the OSI model in great detail. One thing that I can't figure out is the OSI daigram in this book. It shows communication between... (1 Reply)
Discussion started by: gabam
1 Replies
7. Solaris
dear all,
i am working on test server with solaris 10 , after installing OSI deamon i stopped it for a test now when i am starting again i am getting this message that i ggoled and search evrywhere and haven't any response i will be glade for any help in here mate the error was :
./osinet... (1 Reply)
Discussion started by: semaan
1 Replies
LEARN ABOUT MOJAVE
pcap_datalink
PCAP_DATALINK(3PCAP) PCAP_DATALINK(3PCAP) NAME
pcap_datalink - get the link-layer header type SYNOPSIS
#include <pcap/pcap.h> int pcap_datalink(pcap_t *p); DESCRIPTION
pcap_datalink() returns the link-layer header type for the live capture or ``savefile'' specified by p. It must not be called on a pcap descriptor created by pcap_create() that has not yet been activated by pcap_activate(). http://www.tcpdump.org/linktypes.html lists the values pcap_datalink() can return and describes the packet formats that correspond to those values. Do NOT assume that the packets for a given capture or ``savefile`` will have any given link-layer header type, such as DLT_EN10MB for Eth- ernet. For example, the "any" device on Linux will have a link-layer header type of DLT_LINUX_SLL even if all devices on the system at the time the "any" device is opened have some other data link type, such as DLT_EN10MB for Ethernet. RETURN VALUE
pcap_datalink() returns the link-layer header type on success and PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been cre- ated but not activated. SEE ALSO
pcap(3PCAP), pcap-linktype(7) 7 April 2014 PCAP_DATALINK(3PCAP)