osi network layer protocols

... 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 of the OSI ... 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: ... networks • The protocols of the OSI model Network layer specify addressing and processes that enable Transport layer data to be packaged and transported. The Network layer encapsulation allows its contents...

Ngày tải lên: 22/12/2013, 13:17

... 1999 URL:http://mike.passwall.com/networking/netmodels/isoosi7layermodel.html [4] R Feig, “The OSI Reference Model”, Date Unknown, URL:http://www2.rad.com/networks/1994 /osi/ osi.htm [5] H S Ha, OSI 7 Layer , 2000 URL:http://userpages.umbc.edu/~hha1 /network/ protocol.html [6] ... Room Author retains full rights. Page 9 Applying the OSI seven -layer model to Information Security Layer Three - Network Layer The Network layer is concerned with the global topology of the internet ... Applying the OSI seven -layer model to Information Security Layer Six- Presentation Layer The Presentation Layer deals with the organization of data passed from the application layer into the network. ...

Ngày tải lên: 05/03/2014, 21:20

... 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 ... 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 ... 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: Classless InterDomain Routing ❍ subnet...

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 ... 194.12.230.140. 1. Propose a mask of sub -network for the network of company. 194.12.230.0 is a Class C address, the last byte must be used to encode the numbers of sub -network and the numbers of hosts...

Ngày tải lên: 17/09/2012, 09:13

... performance with current and future network technologies. • Improper cable termination can impact transmission performance Physical Layer Protocols & Services • Physical layer elements: – The physical ... Transport layer, placed into packets by the Network layer, and further encapsulated as frames by the Data Link layer. The purpose of the Physical layer is to create the electrical, optical, ... context to give them meaning to the upper layers of the networking model. This framing method can be provided by the Data Link layer, the Physical layer, or by both. • Signal patterns can indicate:...

Ngày tải lên: 22/12/2013, 13:17

... numbers – FIN: No more data from sender Transport Layer Role and Services • Major functions of the transport layer and the role it plays in data networks – Tracking the individual communication ... viện mạng Bách khoa - Website: www.bkacad.com 29 Transport Layer Role and Services • Describe the role of segments in the transport layer and the two principle ways segments can be marked for ... Bách khoa - Website: www.bkacad.com 25 Transport Layer Role and Services Học viện mạng Bách khoa - Website: www.bkacad.com 9 • At the Transport layer the three basic operations of reliability...

Ngày tải lên: 22/12/2013, 13:17

... negotiated cipher Finished switch to negotiated cipher 28 Composition All necessary invariants are satisfied by basic blocks of all the sub -protocols The postconditions of TLS imply the preconditions ... of Octopus and Related Protocols Analysis of the IEEE 802.16e 3-way handshake Short-Password Key Exchange Protocol 802.16e Multicast- Broadcast Key Distribution Protocols MOBIKE - IKEv2 ... Principals, Attacker S e n d Re c e i v e Protocol Private Data Logic has symbolic and computational semantics Network Security Protocols: Analysis methods and standards John Mitchell Stanford University Joint work...

Ngày tải lên: 05/03/2014, 21:20

... 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 ... Appendix B) and add dots for separation. 19.48 Figure 19.13 An ISP and NAT 19.31 Figure 19.4 A network configuration for the block 205.16.37.32/28 19.30 c. The number of addresses can be found...

Ngày tải lên: 06/03/2014, 12:20

... 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 ... bytes are 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 ... of data (40 20).− Example 20.3 20.50 Figure 20.20 Tunneling 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...

Ngày tải lên: 06/03/2014, 12:20

... Management Protocol (IGMP) is one of the necessary, but not sufficient, protocols that is of the necessary, but not sufficient, protocols that is involved in multicasting. IGMP is a companion to ... discussed in this section: Topics discussed in this section: 21.38 Imagine there are three hosts in a network, as shown in Figure 21.19. A query message was received at time 0; the random delay time...

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 ... 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 ... match the corresponding network address. 2. The second mask (/25) is applied to the destination address. The result is 180.70.65.128, which matches the corresponding network address. The next-hop...

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

... 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 SSH: Security Protocols ... 2009 SSL Structure J. Wang. Computer Network Security Theory and Practice. Springer 2009 Chapter 5 Network Security Protocols in Practice Part II J. Wang. Computer Network Security Theory and Practice. ... 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...

Ngày tải lên: 06/03/2014, 16:20

... 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 ... 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 ... 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

... 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 ... 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 ... sizes over long-latency connections. 2.7 Transport -Layer Striping Many researchers have proposed the use of multiple paths by the transport -layer protocols to enhance reliability [8, 67, 58, 7]....

Ngày tải lên: 15/03/2014, 21:20

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Ngày tải lên: 21/06/2014, 14:20

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Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20