tcp ip tools to troubleshoot a connection
A Professional''''s Guide To Data Communication In a TCP/IP World pptx
... reliable data transfer TCP is a transport layer protocol that provides reliable data transfer over point -to- point duplex channels TCP accepts data from the application layer, adds data required to ... contain additional facilities that are used to detect and isolate line and equipment problems 2.2 Making a Data Call Consider a host (Host A) in a multilocation company that needs a data file to ... 1.6.3.7 Gratuitous ARP and Duplicate IP Address Detection A gratuitous ARP frame is an ARP request frame in which the source protocol address (SPA) and target protocol address (TPA) are set to the...
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How to Cheat at Securing Windows 2000 TCP/IP connections phần 1 pot
... into logically separate networks Multiple routes can be configured between networks, providing TCP/ IP with a measure of fault tolerance Computers can act as routers if they are running software ... 44 Encapsulating Security Payload (ESP) 45 TOPIC 10: Security Associations and IPSec Key Management Procedures _ 46 IPSec Key Management 46 Phase 1: ... machines cannot “see” each other, even though they are on the same physical wire The point they should remember is that the combination of IP address and subnet mask can segregate the physical network...
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How to Cheat at Securing Windows 2000 TCP/IP connections phần 2 ppt
... the ARP cache When you add an entry into the ARP cache, you create a static entry A static entry will appear as static in the type field in the ARP cache You might want to create static ARP entries ... network, and WINS was Introduced to help manage the NetBIOS names on a TCP/ IP network WINS is a service that registers IP addresses with the associated computer names and services in a database, and ... NetBIOS names have a maximum length of 15 characters and a flat namespace, two factors that are severely limiting on a large network NetBT is simply the application of NetBIOS working on a TCP/ IP network,...
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How to Cheat at Securing Windows 2000 TCP/IP connections phần 3 pptx
... with the capture filter NOTE A display filter can be used as a database search tool, where the capture frames are the data in our database Assume that the purpose of capturing the data is to determine ... the ARP broadcast is to resolve the IP address to a hardware address The capture was taken from EXETER The ARP broadcast was issued by CONSTELLATION for DAEDALUS, which is the machine with the IP ... Notify means only traps will be sent to the Management Station, and that the Management Station cannot make SNMP requests Read Only allows the Management Station to read the values of the information...
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How to Cheat at Securing Windows 2000 TCP/IP connections phần 4 potx
... LAN at each office location, it may be advantageous to connect the two LANs so that users at both locations can share one another’s resources One way to so is to purchase a leased line such as a ... designated protocols; and whether to automatically enter the logged-on account’s Windows username and password for MS-CHAP authentication If you choose to use EAP (for instance, to enable authentication ... Tunneling protocols are used to create a private pathway or tunnel through an internetwork (typically the Internet) in which data packets are encapsulated and encrypted prior to transmission to ensure...
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How to Cheat at Securing Windows 2000 TCP/IP connections phần 5 pdf
... security payload protocol can provide authentication, integrity, and confidentiality to an IP datagram Authentication services are available with ESP, but the original IP header prior to application ... security on an IP network: • Authentication header (AH) • Encapsulating security protocol (ESP) Authentication Header (AH) The authentication header ensures data integrity and authentication The AH does ... the shared-key approach is not very scaleable or mutable The shared key must be manually entered into every extant IPSec policy An organization with a large number of organizational units, all...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 3 pptx
... access to the transport medium are accommodated, and a header and trailer are constructed Added to the IP datagram, they form the IP frame • In the physical sublayer the logical data stream is ... Internet Protocol (SLIP) are used to transport IP datagrams over point -to- point connections 4.1.2.1 PPP PPP encapsulates an IP datagram with an HDLC header and trailer The frame is listed in Appendix ... mediated analog telephone lines), so that a flag character or an escape character within the IP datagram payload shall not interrupt transmission, PPP employs character stuffing to change the meaning...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 4 ppsx
... discarding it Segmenting a large frame 5.2 Bridging 89 Table 5.1 Comparison of Frames on Different LANs Field Size Ethernet IEEE 802.3 Preamble Variable 0×AA-AA -A 0×AA-AA-AA-AAA-AA-AA -A AA-AA-AA-AA ... ATM network interface layer IP datagram ATM AAL Convergence sublayer adaptation AAL Segmentation and layer AAL reassembly sublayer 48 byte cells ATM layer 53 byte cells Physical layer ATM adaptation ... several IDUs that may be separated in time • AAL5 was created by an industry forum to send frame relay and IP traffic over an ATM network AAL5 supports connection- oriented, variable-bit-rate, and...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 5 ppt
... VLAN-unaware domain LAN VLAN-aware domain E C C E VLAN-unaware domain LAN Figure 5.10 VLAN domains • Use the results to associate the frame with a particular VLAN • Insert the appropriate tag ... encrypted, and wrapped (encapsulated) in a second IP datagram I will call this datagram D[D(1)]2 to symbolize an encrypted IP datagram [D(1)] encapsulated by a second datagram D(2) D(2) contains the IP ... PPP and encrypted by IPsec The original datagram is wrapped in a PPP frame The PPP frame is then incorporated in a new IP datagram with a UDP header and an L2TP header Adding an IPsec encapsulating...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 6 potx
... 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes ... payload To the payload are added bytes of path overhead to form the synchronous payload envelope (SPE) The path overhead contains data that monitors and manages the electrical and optical connections ... between originating and terminating multiplexers To the SPE are added 27 bytes of transport overhead to form a frame The transport overhead contains data that monitors and manages the optical line...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 7 pdf
... read into the data stream as ⇐1000011 In a Token Ring local area network, it will be read into the data stream as ⇐1100001 Ethernet is said to employ little Endian or canonical format and Token ... network A. 3.1 Asynchronous Operation An asynchronous operation is an operation in which characters are framed by start and stop bits and sent as they are generated A straightforward example of asynchronous ... spectrum into separate, nonoverlapping frequency bands, a voice channel and upstream and downstream data channels are created This eliminates self-crosstalk as an impairment • Echo cancellation (EC):...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 8 ppt
... Ethernet Frame HEADER PREAMBLE (8 bytes): 0×AA-AA-AA-AA-AA-AA-AA-AB (6 bytes): If address is unicast, contains the hardware address of a specific station If address is multicast, carries a code that ... IEEE 802.3 MAC HEADER PREAMBLE (7 bytes): 0×AA-AA-AA-AA-AA-AA-AA START DELIMITER (1 byte): 0AB (2 or bytes): If address is unicast, contains the hardware address of a specific station If address ... 802.11 frame List of Acronyms and Abbreviations 4B/5B binary/5 binary 8B/10B binary/10 binary AAL ATM adaptation layer ABM asynchronous balanced mode ABR available bit rate ACELP Algebraic-Code-Excited-Linear-Prediction...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 9 doc
... the payload, to prevent misinterpretation of text, addition of a specific character ahead of a text character that mimics a command For an IP datagram on an asynchronous link, a character that ... in the IP datagram In IPv6, the IP datagram consists of a base header, extension headers, transport layer header, and message The authentication header is one of the extension headers Autonomous ... Internet protocol stack Hardware addresses are discovered, conditions for access to the transport medium are accommodated, and a header and trailer are constructed When added to the IP datagram, they...
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A Professional’s Guide to Data Communication in a TCP/IP World phần 10 ppt
... IP datagrams, SLIP uses a special character Called an END character (0×C0), it is placed at the beginning and ending of each IP datagram Server A device that stores data, organizes and maintains ... switching, frame relay, and ATM employ NBMA links Virtual local area network A logical network created from specific stations in a catenet so that they appear to occupy a private LAN Virtual path A group ... Wide-Area Data Network Performance Engineering, Robert G Cole and Ravi Ramaswamy Winning Telco Customers Using Marketing Databases, Rob Mattison WLANs and WPANs towards 4G Wireless, Ramjee Prasad...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 1 pps
... application layer protocols and the protocols that make up TCP/ IP 1.2 Some Application Layer Protocols At the application layer, the user may generate information at a keyboard, or an application ... standard data link protocols and converts the data stream to a signal stream for transmission over physical facilities to the destination stack Here, the frame is handed off from layer to layer ... Protocol; its major purpose is to make origination and destination addresses available to guide data across networks IP includes several management protocols that are essential to the operation of...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 2 ppsx
... times is an exacting task that is best left to an automatic process For successful operation, all TCP/ IP hosts must have a valid and unique IP address, a subnet mask, and the IP address of a TLFeBOOK ... were based on a mainframe computer (host) that supported many terminals (often characterized as dumb terminals) Server: A data processing device that stores data, organizes and maintains databases, ... 2.3.1.2 Encapsulation and Decapsulation In descending the protocol stack, the overhead data added at each layer is placed in a header, or, in the case of the data link layer, a header and trailer...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 3 pdf
... for access to the transport medium are accommodated, and a header and trailer are constructed Added to the IP datagram, they form the IP frame • In the physical sublayer the logical data stream ... and Serial Line Internet Protocol (SLIP) are used to transport IP datagrams over point -to- point connections 4.1.2.1 PPP PPP encapsulates an IP datagram with an HDLC header and trailer The frame ... mediated analog telephone lines), so that a flag character or an escape character within the IP datagram payload shall not interrupt transmission, PPP employs character stuffing to change the meaning...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 4 pot
... discarding it Segmenting a large frame TLFeBOOK 5.2 Bridging 89 Table 5.1 Field Preamble Comparison of Frames on Different LANs Size Ethernet IEEE 802.3 Variable 0×AA-AA -A 0×AA-AA-AA-AAA-AA-AA -A ... sublayer adaptation AAL Segmentation and layer AAL reassembly sublayer 48 byte cells ATM layer 53 byte cells Physical layer ATM adaptation layer parameters AAL type Bit rate Constant Connection ... that may be separated in time • AAL5 was created by an industry forum to send frame relay and IP traffic over an ATM network AAL5 supports connection- oriented, variable-bit-rate, and bursty data...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 5 potx
... encrypted, and wrapped (encapsulated) in a second IP datagram I will call this datagram D[D(1)]2 to symbolize an encrypted IP datagram [D(1)] encapsulated by a second datagram D(2) D(2) contains the IP ... encapsulating security payload header and trailer and an IPsec authentication trailer provides message integrity and authentication Finally, an IP header is attached that contains the network addresses ... the IP address of a directly reachable router to which the IP datagram is forwarded for eventual delivery to the destination IP address The IP address to which the IP datagram is to be forwarded...
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artech house a professionals guide to data communication in a tcp ip world 2004 phần 6 potx
... 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes 23 data bytes ... payload To the payload are added bytes of path overhead to form the synchronous payload envelope (SPE) The path overhead contains data that monitors and manages the electrical and optical connections ... segregates sample values into ranges and assigns an 8-bit code to each range Whenever a sample value falls within a range, the output is the code assigned to that range Known as DS-0 (digital signal level...
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