common network layer protocol

... strategy 20.7 Switching at the network layer in the Internet uses the datagram approach to packet switching. Note 20.9 20-2 IPv4 20-2 IPv4 The Internet Protocol version 4 ( The Internet Protocol version ... TCP/IP protocols. mechanism used by the TCP/IP protocols. Datagram Fragmentation Checksum Options Topics discussed in this section: Topics discussed in this section: 20.5 Figure 20.3 Network layer ... the options. Example 20.2 20.41 Table 20.6 Next header codes for IPv6 20.1 Chapter 20 Network Layer: Internet Protocol Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction...

Ngày tải lên: 06/03/2014, 12:20

... loss) no congestion no congestion yes no Guarantees ? Network Layer 4-31 The Internet Network layer forwarding table Host, router network layer functions: Routing protocols •path selection • RIP, OSPF, BGP IP protocol • addressing ... format • packet handling conventions ICMP protocol •error reporting • router “signaling” Transport layer: TCP, UDP Link layer physical layer Network layer Network Layer 4-41 IP addressing: CIDR CIDR: ... link Network Layer 4-11 Network layer connection and connection-less service ❒ datagram network provides network- layer connectionless service ❒ VC network provides network- layer connection service ❒ analogous...

Ngày tải lên: 12/09/2012, 15:06

... supposed that 2 IP sub -network share physically the same LAN. The stations on each sub -network then will see circulating all the packets diffused on the physic network. 1 The network layer Addressing ... rental lease) 7 - Engineers network link: 2B-14-62-91-C9-B1 - Engineers network link towards the external router: 2B-14-62-3F-39-21 - Commercial network link: 1C-96-AA-F4-C2-91 - Commercial network link towards ... of an IPv6 service node must provide a means to an upper layer protocol Plasser bit value Traffic Class for packets from the upper layer protocol. The default value should be zero for all 8 bits. The...

Ngày tải lên: 17/09/2012, 09:13

... sử dụng rộng rãi nhất. - Công nghệ SNMP Simple Network Management Protocol là dựa trên TCP/IP protocol dùng trong việc quản lý các device trên network. Những thiết bị thông thường (giá từ ngàn ... nói chung được gọi là NMS( Network Managerment System) bao gồm: + WMI (Web management interface) + CLI (Command Line Interface) + SNMP (Simple Network Management Protocol) Trong đó, SNMP ... định dạng bởi các gói tin PDU (Protocol Data Unit). Các manager và agent sử dụng PDU để trao đổi với nhau  Network Management Station (NMS) Manager cũng được gọi là Network Management Station(...

Ngày tải lên: 31/01/2013, 15:37

... www.bkacad.com 39 Network Layer Protocols and Internet Protocol (IP) Học viện mạng Bách khoa - Website: www.bkacad.com 3 • Define the basic role of the Network Layer in data networks • The protocols ... Identify the role of the Network Layer, as it describes communication from one end device to another end device • Examine the most common Network Layer protocol, Internet Protocol (IP), and its ... the control communication between the Data Link layer and the Network layer is the establishment of a maximum size for the packet. Network Layer Fields Học viện mạng Bách khoa - Website:...

Ngày tải lên: 22/12/2013, 13:17

... Method Intruder Model Analysis Tool Formal Protocol Informal Protocol Description Find error 24 Protocol composition logic Alice’s information  Protocol  Private data  Sends and receives Honest ... 3-way handshake Short-Password Key Exchange Protocol 802.16e Multicast- Broadcast Key Distribution Protocols MOBIKE - IKEv2 Mobility and Multihoming Protocol Analysis of ZRTPOnion Routing Security ... sub-protocols The postconditions of TLS imply the preconditions of the 4-Way handshake The postconditions of 4-Way handshake imply the preconditions of the Group Key protocol 13 Run of protocol A B Initiate Respond C D Correct...

Ngày tải lên: 05/03/2014, 21:20

... long-term problem for the Internet. This and other problems in the IP protocol itself have been the other problems in the IP protocol itself have been the motivation for IPv6. motivation for ... discussed in this section: 19.7 Numbering systems are reviewed in Appendix B. Note 19.1 Chapter 19 Network Layer: Logical Addressing Copyright © The McGraw-Hill Companies, Inc. Permission required for ... ISP 19.32 The first address in a block is normally not assigned to any device; it is used as the network address that represents the organization to the rest of the world. Note 19.49 19-2 IPv6...

Ngày tải lên: 06/03/2014, 12:20

... ICMP The IP protocol has no error-reporting or error- The IP protocol has no error-reporting or error- correcting mechanism. The IP protocol also lacks a correcting mechanism. The IP protocol also ... Management Protocol (IGMP) is one Internet Group Management Protocol (IGMP) is one of the necessary, but not sufficient, protocols that is of the necessary, but not sufficient, protocols that ... designed to compensate for the above two deficiencies. It is a companion to the IP protocol. It is a companion to the IP protocol. Types of Messages Message Format Error Reporting and Query Debugging...

Ngày tải lên: 06/03/2014, 12:20

... mask matching 22.34 Figure 22.17 Two-node instability 22.27 22-3 UNICAST ROUTING PROTOCOLS 22-3 UNICAST ROUTING PROTOCOLS A routing table can be either static or dynamic. A A routing table can ... Internet. A routing a change somewhere in the Internet. A routing protocol is a combination of rules and procedures that protocol is a combination of rules and procedures that lets routers ... not match the corresponding network address. 2. The second mask (/25) is applied to the destination address. The result is 201.4.22.0, which does not match the corresponding network address (row 2). 22.43 Figure...

Ngày tải lên: 06/03/2014, 12:20

... Networks  5.2 Public-Key Infrastructure  5.3 IPsec: A Security Protocol at the Network Layer  5.4 SSL/TLS: Security Protocols at the Transport Layer  5.5 PGP and S/MIME: Email Security Protocols  5.6 ... Networks  5.2 Public-Key Infrastructure  5.3 IPsec: A Security Protocol at the Network Layer  5.4 SSL/TLS: Security Protocols at the Transport Layer  5.5 PGP and S/MIME: Email Security Protocols  5.6 ... Protocols at the Transport Layer  5.5 PGP and S/MIME: Email Security Protocols  5.6 Kerberos: An Authentication Protocol  5.7 SSH: Security Protocols for Remote Logins J. Wang. Computer Network...

Ngày tải lên: 06/03/2014, 16:20

... A Security Protocol at the Network Layer  5.4 SSL/TLS: Security Protocols at the Transport Layer  5.5 PGP and S/MIME: Email Security Protocols  5.6 Kerberos: An Authentication Protocol  5.7 ... Computer Network Security Theory and Practice. Springer 2009 Chapter 5 Outline  5.1 Crypto Placements in Networks  5.2 Public-Key Infrastructure  5.3 IPsec: A Security Protocol at the Network Layer  5.4 ... Layer  5.4 SSL/TLS: Security Protocols at the Transport Layer  5.5 PGP and S/MIME: Email Security Protocols  5.6 Kerberos: An Authentication Protocol  5.7 SSH: Security Protocols for Remote Logins ...

Ngày tải lên: 06/03/2014, 16:20

... advantage of whatever network- layer secu- rity services their environment provides. More impor- tantly, IPsec offers a remarkable flexibility not possible at higher or lower network layers: security ... is comprised of a set of protocols that provide data integrity, confidential- ity, replay protection, and authentication at the network layer. This positioning in the network stack offers con- siderable ... IPsec by maximizing network traffic using ttcp. In our next set of experiments, we investigate how IPsec behaves under “normal” network load and how it compares with other secure network transfer...

Ngày tải lên: 14/03/2014, 22:20

... made to enhance network performance using striping techniques at the link -layer, transport -layer, and application -layer. We are the first to implement and evaluate a transport -layer protocol that ... robustness. Based on the network layer where the striping techniques are applied, we classify them into link -layer, transport -layer, and application -layer striping. 2.1 Network Testbeds We evaluate ... striping without requiring any changes to the upper layers of the protocol stack. Another area of related work is the use of striping at the application -layer to improve throughput by opening multiple...

Ngày tải lên: 15/03/2014, 21:20

... Message Protocol. DARPA Network Working Group Report RFC-792, USC Information Sciences Institute, September 1981. 8. Defense Advanced Research Projects Agency. In- ternet Protocol. DARPA Network ... synchronizing network clocks. DARPA Network Working Group Report RFC-956, M/A-COM Linkabit, September 1985. 20. Mills, D.L. Experiments in network clock synchro- nization. DARPA Network Working ... Time Protocol. DARPA Network Working Group Report RFC-1129, University of Delaware, October 1989. 24. Mills, D.L. On the accuracy and stability of clocks synchronized by the Network Time Protocol...

Ngày tải lên: 16/03/2014, 16:20

... Timestamp • Second protocol saves messages, fits more easily into existing protocols that expect passwords • First protocol does not require synchonized clocks • Second protocol must keep a ... countermeasures – ATM: eat your card – military: shoot you – networking: lock account (subject to DOS) or be slow per attempt 1 Network Security Protocols: A Tutorial Radia Perlman May 2005 (radia.perlman@sun.com) 25 Cryptographic...

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Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20