tcp ip and the osi models
Network Security Protocols in Practice Part I docx
... put the security protocol in the network architecture? J Wang Computer Network Security Theory and Practice Springer 2009 The TCP/ IP and the OSI Models J Wang Computer Network Security Theory and ... Computer Network Security Theory and Practice Springer 2009 TCP/ IP Packet Generation J Wang Computer Network Security Theory and Practice Springer 2009 What Are the Pros and Cons? Application ... Computer Network Security Theory and Practice Springer 2009 IPsec: Network-Layer Protocol IPsec encrypts and/ or authenticates IP packets It consists of three protocols: Authentication header...
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Tài liệu giảng dạy CCNA - module 01 chapter 02 -The TCP IP and OSI Networking Models
... Table of Content The TCP/ IP protocol architecture The OSI model THE TCP/ IP PROTOCOL ARCHITECTURE The TCP/ IP Application Layer TCP/ IP application layer protocols provide services to the application ... and the network itself The TCP/ IP Application Layer (cont.) Web server TCP/ IP Network Web client Give me your home page Larry This is file home.htm Bob First, the request for the file and the ... combines the presentation and session layer issues into its application layer TCP/ IP combines the OSI data link and physical layers into the network access layer TCP/ IP appears simpler because...
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Tài liệu TCP/IP and tcpdump pdf
... Source Quench Redirect Redirect Datagram for the Network Redirect Datagram for the Host Redirect Datagram for the TOS & Network Redirect Datagram for the TOS & Host Echo Router Advertisement Router ... no more data; Finish connection) Checksum Covers pseudoheader and entire TCP segment Urgent Pointer Points to the sequence number of the byte following urgent data Options End of Options list No ... socks Offset Number of 32-bit words in TCP header; minimum value = Reserved bits; set to Flags (CEUAPRSF) Fragment Offset Position of this fragment in the original datagram, in units of bytes...
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Practical TCP/IP and Ethernet Networking- P1 pptx
... Wright) Practical TCP/ IP and Ethernet Networking (Deon Reynders, Edwin Wright) Practical Variable Speed Drives and Power Electronics (Malcolm Barnes) Practical TCP/ IP and Ethernet Networking Deon ... Practical TCP/ IP and Ethernet Networking Titles in the series Practical Cleanrooms: Technologies and Facilities (David Conway) Practical Data Acquisition for Instrumentation and Control Systems ... means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the...
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Practical TCP/IP and Ethernet Networking- P2 ppt
... cover the main areas of TCP/ IP and Ethernet in detail, while going through the practical implementation of TCP/ IP in computer and industrial applications Troubleshooting and maintenance of TCP/ IP ... TCP/ IP and this is being used as the open standard today for all network and communications systems The reasons for this popularity are not hard to find TCP/ IP and Ethernet are truly open standards ... Introduction to TCP/ IP A brief review of the origins of TCP/ IP to lay the foundation for the following chapters Chapter 6: Internet layer protocols Perhaps the workhorse of the TCP/ IP suite of protocols...
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Practical TCP/IP and Ethernet Networking- P3 ppsx
... a minimum and maximum frequency and the difference between those frequencies is the bandwidth of that signal The bandwidth of an analog channel is the difference between the highest and lowest ... separate the data from the noise and communication errors occur An important parameter of the channel is the ratio of the power of the received signal (S) to the power of the noise signal (N) The ... defining the function of the various data, timing and control signals used at the interface It should be emphasized that the interface standard only defines the electrical and mechanical aspects of the...
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Practical TCP/IP and Ethernet Networking- P4 ppsx
... Describe the functions of each layer in the OSI reference model • Indicate the structure and relevance of the IEEE 802 (ISO 8802) series of Standards and Working Groups • Identify hub, ring and bus ... of each other By conforming to the OSI standards, a system is able to communicate with any other compliant system, anywhere in the world It should be realized at the outset that the OSI reference ... they travel through the network they may get separated and handled independently from each other, but eventually arrive at their correct destination For this reason, packets often arrive at the...
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Practical TCP/IP and Ethernet Networking- P5 pps
... have all standardized on the three layers only One of the challenges with the use of the OSI model is the concept of interoperability and the need for definition of another layer above the application ... transmitting stack and up through the stack on the receiving stack Figure 2.9 shows the full architecture of the OSI model, whilst Figure 2.10 shows the effects of the addition of PCI to the respective ... to the physical layer and from there, the data is transmitted to the physical layer on the destination machine Network architectures (such as Ethernet, ARCnet, Token Ring, and FDDI) encompass the...
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Practical TCP/IP and Ethernet Networking- P6 pdf
... to the network, the token is returned to sender with the acknowledgment The sender then releases the token to the next node on the network If this node has nothing to say, the node passes the ... to node, until the packet reaches its destination The recipient acknowledges the packet by sending the message back to the sender, who then sends the token on to the next node in the network In ... standards for secure LAN communications /+++ =OXKRKYY 2'4Y The IEEE802.11 Wireless LAN standard uses the 2.4 GHz band and allows operation to or Mbps The 802.11b standard also uses the...
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Practical TCP/IP and Ethernet Networking- P7 pptx
... signaling standards and transmission speeds that can be utilized These include both base band and broadband signaling, and speeds of Mbps and 10 Mbps The standard is continuing to evolve, and this ... transceiver on the NIC is not used Rather, there is a transceiver in the MAU and this is fed with power from the NIC via the AUI cable Since the transceiver is remote from the NIC, the node needs ... the CSMA/CD protocol • List the fields in the Ethernet data frames • Describe the causes of Ethernet collisions and how to reduce them • Demonstrate how to apply the Ethernet design rules /+++...
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Practical TCP/IP and Ethernet Networking- P8 ppsx
... integer multiple of the slot time In the first attempt, the node will choose, at random, either one or zero slot times delay If another collision occurs, the delay will be chosen at random from ... is normally random data The CRC is calculated over the data in the pad field Once the CRC checks OK, the receiving node discards the pad data, which it recognizes by the value in the length field ... TKZ]UXQY the cable, and some short time later they ‘collide’ Almost immediately, node 2’s transceiver recognizes that the signals on the cable are corrupted, and the logic incorporated on the NIC...
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Practical TCP/IP and Ethernet Networking- P9 ppsx
... rules The cable distance and the number of repeaters, which can be used in a 100Base-T collision domain, depends on the delay in the cable and the time delay in the repeaters and NIC delays The ... (FCS) to verify the frame validity Then the frame is buffered in the internal memory of the port before being forwarded to the other ports of the repeater It is therefore combining the functions ... round-trip delay for 100Base-T systems is the time to 66 Practical TCP/ IP and Ethernet Networking transmit 64 bytes or 512 bits and equals 5.12 µs A frame has to go from the transmitter to the most...
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Practical TCP/IP and Ethernet Networking- P10 pptx
... between the two models is depicted in Figure 5.1 Figure 5.1 OSI vs ARPA models :NK :)6/6 VXUZUIUR Y[OZK \Y ZNK '86' SUJKR TCP/ IP, or rather – the TCP/ IP protocol suite – is not limited to the TCP ... hand, it issues IP addresses and therefore seems to reside at the Internet Layer, as is the case with RARP On the other hand, it allows a device to download the necessary boot file via TFTP and ... contains the address information needed for its routing through the Internet work to the receiving host The dominant protocol at this level is the IP (as in TCP/ IP) , namely the Internet protocol There...
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Practical TCP/IP and Ethernet Networking- P12 ppt
... into IPv6 They include the following: • The IPv6 addressing structure embeds IPv4 addresses within IPv6 addresses, and encodes other information used by the transition mechanisms • All hosts and ... possible despite the increased size of the addresses Even though the IPv6 addresses are four times longer than the IPv4 addresses, the IPv6 header is only twice the size of the IPv4 header • Improved ... in the case of upgrading hosts to IPv6 the DNS server must first be upgraded to handle IPv6 address records When existing IPv4 hosts or routers are upgraded to IPv6, they may continue to use their...
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Practical TCP/IP and Ethernet Networking- P13 pot
... is used with IPv4 Initially the designers of IPv6 assumed that it would use ARP as well, but subsequent work by the SIP, SIPP and IPv6 working groups led to the development of the IPv6 ‘neighbor ... the number of the entry in the table Physical address – the MAC address of the device Internet protocol (IP) address – the corresponding IP address Type – the type of entry in the ARP cache There ... incorporated into the TCP/ IP protocol suite to report errors and other useful information about the performance and operation of the network /)36 SKYYGMK YZX[IZ[XK ICMP communicates between the Internet...
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Practical TCP/IP and Ethernet Networking- P14 ppt
... is the time that the datagram took to travel to the server and back, or the round trip time (RTT) The time to the server is then onehalf of this The correct time at the moment of originating the ... field The server then inserts its current time in the ‘transmit’ field and returns the message In practice, the ‘received’ and ‘transmit’ fields for the server are set to the same value The client, ... by the client inserting its current time in the ‘originate’ field, and sending the ICMP datagram off to the server The server, upon receiving the message, then inserts the ‘received’ time in the...
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Practical TCP/IP and Ethernet Networking- P15 ppsx
... in the IP header and the port number is contained in the TCP or UDP header In order for any data to be transferred under TCP, a socket must exist both at the source and at the destination TCP ... the counter where x can vary between and 232 –1) and inserts it in the sequence number field It then sets the SYN flag = and transmits the header (no data yet) to the appropriate IP address and ... windows, and sequence numbers/acknowledgments 124 Practical TCP/ IP and Ethernet Networking 7.1.2 Ports Whereas IP can route the message to a particular machine on the basis of its IP address, TCP...
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Practical TCP/IP and Ethernet Networking- P16 pdf
... commands, transfer parameter commands and access control commands There is also a series of reply codes Here follows a brief summary of the commands and reply codes Service commands These commands ... observe and understand the command flow, and aids the debugging process The user can communicate directly with the server program by using these codes, but in general this is not advisable FTP commands ... exists Command can be reissued 5yz Command not accepted or completed Don’t reissue – reissuing the command will result in the same error 136 Practical TCP/ IP and Ethernet Networking The second...
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Practical TCP/IP and Ethernet Networking- P17 docx
... and to allow read/write or read-only access 144 Practical TCP/ IP and Ethernet Networking On the computer named market1, the system administrator decides to connect the reports directory to the ... contains the basic information for each CCTLD such as the governing agency, administrative and technical contact names telephone and 146 Practical TCP/ IP and Ethernet Networking fax numbers, and server ... implement the DNS nameserver functions In processing a command that uses a domain name instead of an IP address, the TCP/ IP software automatically invokes the DNS resolver function The resolver then...
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Practical TCP/IP and Ethernet Networking- P18 doc
... • Your IP address: 32 bits Set by the server to the correct IP address for the client, if the client advertises its IP address as • Server IP address: 32 bits Server IP address, set by the server ... consist of an IP address, subnet mask, lease period (in seconds), and the IP address of the proposing DHCP server These offers are sent to the requesting client’s MAC address The pending IP address ... from the SMTP server to the user When the message transfer is complete another message can be sent, the direction of transfer changed, or the connection closed Closing the connection, involves the...
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