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Which device work in presentation layer in osi modul

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I don't understand your problem clearly.
As far as i understand so this may be solution to your problem.
Solution:
"Gateway Re-director is operates on the presentation layer in OSI model"

Posted on Jan 04, 2011

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1 Answer

Network layer


What is the question here?
If you are asking about in the OSI model it is Layer 3.
http://en.wikipedia.org/wiki/Network_layer

Nov 04, 2013 | Quintum Computers & Internet

1 Answer

EFAH05W factory reset


Hub's are strictly physical devices running at layer 1 of the OSI Moldel. I therefore agree with clydeww.
There is nothing to reset that turning it off and on won't do.

Jun 11, 2012 | Linksys EtherFast Workgroup (EFAH05W-CA)...

1 Answer

How does a router and a splitter looks like and how as well they differ?


A router is a more sophisticated network device than either a switch or a hub. Like hubs and switches, network routers are typically small, box-like pieces of equipment that multiple computers can connect to. Each features a number of "ports" the front or back that provide the connection points for these computers, a connection for electric power, and a number of LED lights to display device status. While routers, hubs and switches all share similiar physical appearance, routers differ substantially in their inner workings.


Splitter is nothing but a Switch.
Switches may operate at one or more OSI layers, including physical, data link, network, or transport (i.e., end-to-end). A device that operates simultaneously at more than one of these layers is known as a multilayer switch.
In switches intended for commercial use, built-in or modular interfaces make it possible to connect different types of networks, including Ethernet, Fibre Channel, ATM, ITU-T G.hn and 802.11. This connectivity can be at any of the layers mentioned. While Layer 2 functionality is adequate for bandwidth-shifting within one technology, interconnecting technologies such as Ethernet and token ring are easier at Layer 3.
Interconnection of different Layer 3 networks is done by routers. If there are any features that characterize "Layer-3 switches" as opposed to general-purpose routers, it tends to be that they are optimized, in larger switches, for high-density Ethernet connectivity.

Feb 07, 2011 | D-Link AirPlus DI-524 Wireless Router

1 Answer

What is layer 2 ip?


layer 2 addresses are MAC addresses, which are hard coded in to networking devices, such as network cards. 'IP' addresses are classed as layer 3 addresses.

the 'layers' come from the OSI model

hope that helps :)

Oct 15, 2010 | Computers & Internet

1 Answer

Layer3


Which model are you talking about ? I have included both


Here is the OSI model
Layer 1 = physical medium & signal on the wire (physical)
Layer 2 = MAC Address and SNAP (ATM) (data link)
Layer 3 = IP Addressing V4 V6 (network)
Layer 4 = TCP/UDP (RTP, RTSP) (transport)
Layer 5 = Duplexing Half or full (Session)
Layer 6 = HTTP, FTP, SNMP (presentation)
Layer 7 = Web browser, FTP Client, (application)

TCP Model:
Layer 1 = physical medium & signal on the wire (physical) (Hub and reapeter)

Layer 2 = MAC Address and SNAP (ATM) (data) (Switches and bridges)

Layer 3 = IP Addressing V4 V6,
Layer 4 = TCP/UDP (RTP, RTSP) (Internetwork) (Firewall, IPSEC) Routers

(This function is split between 4&5) Duplexing Half or full

Layer 5 = , HTTP, FTP, SNMP, Web browser, FTP Client, (application) (programs)


I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Feb 11, 2009 | IBM Nways 8277 Model 524 Networking Switch

1 Answer

Why we starting using OSI model


He probably needs an answer to the topic question for his studies.

ANSWER: The reason we started using it was to enable network communication between the various networking hardware products of various producers without it mattering which one was produced by who and on what platform. This is possible because the OSI model is a standardisation (ISO 7498-1) which lists the various functions provided by different network protocols into layers on top of each other in a way that the layers above each other can only use functions provided by a sub-layer and can only provide functions for a superior layer. The model clearly specifys how one layer can interact with the other. (this by the way is what we call RFC -- Request for Comments) This way a software of the layer written by one producer could cooperate/communicate with the software of a layer written by a different producer even on two different platforms.

Please rate if this solution helped you.

Feb 02, 2009 | Gateway Essential 400 PC Desktop

1 Answer

What is osi model


The 7 Layers of the OSI Model
Last updated: March 03, 2008
The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station, proceeding to the bottom layer, over the channel to the next station and back up the hierarchy.
Application
(Layer 7)
This layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Tiered application architectures are part of this layer.
Presentation
(Layer 6)
This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems. It is sometimes called the syntax layer.
Session
(Layer 5)
This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination.
Transport
(Layer 4)
This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer.
Network
(Layer 3)
This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.
Data Link
(Layer 2)
At this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. The data link layer is divided into two sub layers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sub layer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking.
Physical
(Layer 1)
This layer conveys the bit stream - electrical impulse, light or radio signal -- through the network at the electrical and mechanical level. It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. Fast Ethernet, RS232, and ATM are protocols with physical layer components.



For further details go to:

http://en.wikipedia.org/wiki/OSI_model

Jan 13, 2009 | Computers & Internet

1 Answer

Hello


SOCKS is an Internet protocol that facilitates the routing of network packets between client-server applications via a proxy server. SOCKS performs at Layer 5 of the OSI model - the Session Layer (an intermediate layer between the presentation layer and the transport layer).

Clients behind a firewall may connect to a SOCKS proxy server in order to access external services through the firewall. Such a proxy server controls the eligibility of the client to access the external server and, if the client has eligibility, passes the request on to the server. SOCKS can also be used in the opposite way, allowing the clients outside the firewall ("exterior clients") to connect to servers inside the firewall (internal servers).

SOCKS software

* Kernel SOCKS Bouncer ksb26 (Kernel Socks Bouncer) is a Linux Kernel 2.6.x Loadable Kernel Module that redirects TCP connection (to user-defined target hosts) through socks 4/5 chains.
* SS5 Socks Server is an open-source SOCKS4/SOCKS5 server.
* Dante is an open-source SOCKS4/SOCKS5 implementation with commercial support developed by Inferno Nettverk A/S.
* OpenSSH allows dynamic creation of tunnels, specified via a subset of the SOCKS protocol, supporting the CONNECT command.
* WinSocks is a light-weight SOCKS4/SOCKS5 server developed by Proxy Labs.
* SOcat Multipurpose relay (SOcket CAT): includes socks4, and socks4a functionality (Linux / Mac)
* FreeCap Socksifyer for Windows, any App can run its network traffic transparently via a SOCKS or HTTP proxy.
* Simple Socks Server for Perl - SSS is a Simple SOCKS Server written in perl that implements the SOCKS v5 protocol.
* Sun Java System Web Proxy Server is a caching proxy server running on Solaris, Linux and Windows servers that supports HTtp://S, NSAPI I/O filters, dynamic reconfiguration, SOCKSv5 and reverse proxy.
* BarracudaDrive Web Server - commercial SOCKS HTTP HTTPS tunnel/server, available for Windows, embedded Linux and Mac OS X (PowerPC)
* DeleGate is a multi-purpose application level gateway and proxy server which runs on multiple platforms. Beside SOCKS it also supports HTTP(S), FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, DNS and many more.

Jan 05, 2009 | Computers & Internet

1 Answer

Layer3


http://en.wikipedia.org/wiki/OSI_model

Layer3 is the Network Layer of the OSI Model, IP operates at Network Layer, OSI Model comprises of 7 layers, Application, Presentation, Session, Transport, Network, Datalink, Physical layers.

It is a model to follow when you are building Operating systems, applications to be used on the internet or compatibility with others.

Hope this helps

Mutahir

PS : Read about it on the wiki link i have provided, let me know for any other questions you may have.

Sep 15, 2008 | Computers & Internet

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