how many networking layers are theree?
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I am not sure if you are referring to the OSI layers, if it is the OSI layers, there would be 7. Data, Physical, Network, Transport, Session, Presenation, and Application. Hope this is what you are looking for.
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Layer one the physical layer\n\n\nHome > Quick Reference  \nThe 7 Layers of the OSI Model\n\nThe 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. \nApplication\n(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. \nPresentation\n(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. \nSession\n(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. \nTransport\n(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. \nNetwork\n(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. \nData Link\n(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 sublayers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sublayer 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. \nPhysical\n(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. \n\n\n\n\n\nThis graphic is taken from The Abdus Salam International Centre for Theoretical Physics.
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I assume you mean the OSI Seven-Layer Model.  The Levels are from top to bottom:\n\n(Taken from Connected: An Internet Encyclopedia)\n\n1. The Physical Layer describes the physical properties of the various communications media, as well as the electrical properties and interpretation of the exchanged signals. Ex: this layer defines the size of Ethernet coaxial cable, the type of BNC connector used, and the termination method.\n\n2. The Data Link Layer describes the logical organization of data bits transmitted on a particular medium. Ex: this layer defines the framing, addressing and checksumming of Ethernet packets.\n\n3. The Network Layer describes how a series of exchanges over various data links can deliver data between any two nodes in a network. Ex: this layer defines the addressing and routing structure of the Internet.\n\n4. The Transport Layer describes the quality and nature of the data delivery. Ex: this layer defines if and how retransmissions will be used to ensure data delivery.\n\n5. The Session Layer describes the organization of data sequences larger than the packets handled by lower layers. Ex: this layer describes how request and reply packets are paired in a remote procedure call.\n\n6. The Presentation Layer describes the syntax of data being transferred. Ex: this layer describes how floating point numbers can be exchanged between hosts with different math formats.\n\n7. The Application Layer describes how real work actually gets done. Ex: this layer would implement file system operations.\n\nMore here, http://www.freesoft.org/CIE/Topics/15.htm
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The subnet mask on the subnets should probably be 255.255.255.224 -- 224 is 7 * 32, so this would in theory allow you 8 subnets of 32 computers each.  The subnets would be:\n\n210.115.32.0 - 210.115.32.31\n210.115.32.32 - 210.115.32.63\n210.115.32.64 - 210.115.32.95\n210.115.32.96 - 210.115.32.127\n\nand so on.\n\nThere are a few reserved addresses -- I wouldn't use all zeroes or all ones, so in practice, you could use 6 subnets of 30 addresses.  One of your addresses has to be used by the router on the subnet, so you're down to 6 subnets of 29 addresses.\n\nThose addresses sure go fast!
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You can put two LAN segments in a server by adding network cards and sharing them through ICS. However they will each have their own modems and won't be teamed up together for more bandwidth.
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hey dude, r u joking.\nIf not, then read this paragraph.\n\nNetwork in computer is that, where we can communicate 2 or more than 2 computer to each other.And this technology is called Networking.\n\nThere are so many method for networking.\nAs workgroup level,Domain level .Peer to peer netwoking etc.\n\nWhen we use internet, then there is also a need of network.\nbut here is a wireless network used.\n\nGood luck!!!!!!!!!!!
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More than you have room for PC's in your house...\n\nThis totally depends on what kind of devices you will have and what protocols are in use. For most places, you communicate via IP. Again, most places have a private class c address, meaning that you can have 254 physical devices on the subnet. Now, devide this by the number of ports per switch (less one port for daisey chaining them) and this will give you the number of switches on your LAN.\n\nSo - too many variables - theoritical limit is millions - pratical is 8 (16 ports each).\n\nIf you are talking hub, then this goes way down due to probability of collisions. Switch eliminates this problem.
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Data network, video network and voice network all in one.\nUsually, this refers to phone system which runs on ethernet network (type of VOIP).\nThe idea is that there is reduced cost in maintaining only one network.
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A layer 3 switch will switch packets faster than a traditional router because the packet switching is done in hardware as opposed to being done in software.  \n\nThat said, if you have these servers all on the same network/subnet, you don't need either one.  Just a fast layer 2 switch.  \n\nBut if you are going to have to jump between networks/subnetworks where a router would normally be required, a layer 3 switch (a fast one) is the way to go.
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Kindly go through Tennanbaum Networking book, they ask most questions from it.\n\nSome of the ques i know are:\n1.7 layers of the network\n2.TCPIP protocol\n3.cables,fibres,etc\n4.encryption and cryptography\nand other topics in the above book
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this is a search result:\nhttp://images.google.co.in/images?hl=en&q=computer%20networks&sa=N&tab=wi\ntry this..
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Hello,\n\nIf your question about how to assign 4 dns address in on LAN connection then this is your answer\n\nRight Click on my network places and properties and select local area connection and properties and intenet protocol(TCP/IP) and properties now select advanced and select dns and add as many as dns you want
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Routing occurs at layer 3 (the Network layer e.g. IP) of the OSI seven-layer protocol stack.
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Visit this website to find out.\n\nhttp://en.wikipedia.org/wiki/Firewall_%28networking%29
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Didn't you ask this same question yesterday?  If there were no standards, then parts wouldn't be interchangeable.  Also, for LAN standards, do a search on TCP/IP subnetting.
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Modem\nDSL\nCable\nISDN\nT1\nT3\nWireless\n\nToo many to list actually
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I found this article that might give you some suggestions:\n\nhttp://www.networkcomputing.com/showitem.jhtml?articleID=160910914&pgno=1\n\nplrr