osi network layer functions

... 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 ... 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 ... 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,...

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

... 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: ... as network adapters (NICs), interfaces and connectors, cable materials, and cable designs are all specified in standards associated with the Physical layer. Characteristics & Uses of Network...

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

... 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

... The protocol field is the next byte (02), which means that the upper -layer protocol is IGMP. Example 20.4 20.10 Figure 20.4 Position of IPv4 in TCP/IP protocol suite 20.22 In an IPv4 packet, the ... 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

... 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

... 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 ... Direct and indirect delivery 22.24 Example 22.6 (continued) The destination column here defines the network address. The term gateway used by UNIX is synonymous with router. This column actually...

Ngày tải lên: 06/03/2014, 12:20

... chapters related to Network Aspects and Applications of Ad Hoc, Sensor and Mesh Networks. In this section, the network layer design in cellular, ad hoc, sensor and mesh networks for specic ... on various network parameters, such as the network throughput or the CBP achieved, to ensure that no SC or user class dominates the network resources. 3. Mobile & Wireless Networks Modeling ... Communications: Network layer and circuit level design, Edited by Salma Ait Fares and Fumiyuki Adachi p. cm. ISBN 978-953-307-042-1 MobileandWirelessCommunications: Network layer andcircuitleveldesign6 ...

Ngày tải lên: 21/06/2014, 14:20

... reserves. Both networking scenarios are having high application value in WSN arena, an all-to-all networking scenario and a mobile data collector based data collection network. In both networks we ... node MobileandWirelessCommunications: Network layer andcircuitleveldesign40 Fig. 1. - An all-to-all network consisting of six nodes. The network model assumes followings;  Nodes ... min R , MobileandWirelessCommunications: Network layer andcircuitleveldesign42 Definition 1. Limited Capacity Network: A multi-casting network satisfying the equation (8) on the number...

Ngày tải lên: 21/06/2014, 14:20

... IQMESH network chaining is shown in Fig. 5. Two networks in Fig. 5, Network 1 and Network 2, are independent IQRF wireless networks. Every such network has one Coordinator (C) and one or more ... in the Network 1 and simultaneously create own Network 2 as its Coordinator. Listening communication in both networks, some packets received in the Network 1 would be forwarded to the Network ... IQMESH network chaining is shown in Fig. 5. Two networks in Fig. 5, Network 1 and Network 2, are independent IQRF wireless networks. Every such network has one Coordinator (C) and one or more...

Ngày tải lên: 21/06/2014, 14:20

... at overcoming the opposing substrate requirements of circuits and antennas. These largely involve the use of layered materials with high and low permittivities in adjacent layers (Chen, 2008). ... 2008). However such 8 MobileandWirelessCommunications: Network layer andcircuitleveldesign116 ground plane etched on the opposite side of the dielectric substrate. It provides a bandwidth ... gallium arsenide substrate with the feed network, and the radiating elements located on an adjacent (low dielectric constant) substrate, and coupled to the feed network through apertures in the ground...

Ngày tải lên: 21/06/2014, 14:20

... the deposition of a 500 nm thick graded AlGaN layer on the substrate to reduce the number of threading dislocations in the GaN buffer layer due to the lattice mismatch between GaN and SiC layers. ... buffer layer is then deposited to get lower background carrier concentration, which accordingly results in increased electron mobility in the above unintentionally doped layers. The buffer layer ... passivation layer is then deposited to reduce the surface trapping induced drain-current dispersion. Field plate connected to the gate, at the gate pad, and deposited over the passivation layer was...

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20

Ngày tải lên: 21/06/2014, 14:20