Concept of packets

Advanced Computer Networks: Lecture 23. This lecture will cover the following: concepts of networking & network programming; issues related to bits/frames sent on a single link; design issues of direct link networks; building a packet abstraction on a link;...

21p haoasakura 30-05-2022 23 4   Download

Lecture Computer networks: Lesson 4 - Hammad Khalid Khan. The main topics covered in this chapter include: packets, frames and error detection; introduces the concept of packets; reasons for using packets; problems with the sharing; solution for fairness; Time-Division Multiplexing;...

22p youzhangjing_1909 28-04-2022 15 3   Download

Lecture Windows programming - Lesson 27: Introduction to Network Programming. The main topics covered in this chapter include: concept of a packet of information; IP addresses and ports; the structure of an IP packet; connection-oriented vs. datagram protocols; IP, TCP and UDP; HTTP, other wrapper protocols;...

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Lecture Network programming - Chapter 1: Basic Network Concepts (Tran Thi Ha Trang) provide students with knowledge about network, the layer of a network, IP address, internet, internet standards, packet-switched networks, protocol, protocol in different layers of a network,...

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Chapter 6 - Delivery, forwarding, and routing of IP packets. This chapter describes the delivery and forwarding of IP packets. Delivery refers to the way a packet is handled by the underlying networks under the control of the network layer. Concepts such as direct and indirect delivery are discussed. Forwarding refers to the way a packet is delivered to the next station. We discuss two trends in forwarding: forwarding based on destination address of the packet and forwarding based on the label attached to the packet.

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In this paper, we propose a novel secured compression algorithm for an ad hoc network in which the packets are encrypted and compressed. The decompression and decryption using the same algorithm happens by a perfect synchronization between the sender and the receiver. It is observed that the proposed security concept may increase the level of confidence in this network.

6p byphasse043256 23-03-2019 16 1   Download

In this paper, we propose a solution for Long Term Evolution (LTE) mobile network based on the concept of NDN. By OPNET Modeler simulation, we carry out the evaluation in realistic mobile network with a huge number of mobility LTE mobile stations access to a single server, where content names and content sizes are obtained from real trace of Internet traffic. The obtained results show that Evolved Packet Core (EPC) caching scheme can helps to further increases the quality of service as well as offloads server traffic significantly.

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Chapter 3 - Transport layer. After reading this chapter, the reader should be able to: Understand the position of the transport layer in the internet model; understand the rationale for the existence of the transport layer; understand the concept of application-to-application delivery; understand the duties of the transport layer: packetizing, addressing, connection creation, and reliable delivery.

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This chapter describes the delivery and forwarding of IP packets. Delivery refers to the way a packet is handled by the underlying networks under the control of the network layer. Concepts such as direct and indirect delivery are discussed. Forwarding refers to the way a packet is delivered to the next station. We discuss two trends in forwarding: forwarding based on destination address of the packet and forwarding based on the label attached to the packet.

38p tangtuy09 26-04-2016 48 2   Download

In this chapter, you will learn to: Explain how ACLs are used to secure a medium-size enterprise branch office network, including the concept of packet filtering, the purpose of ACLs, how ACLs are used to control access, and the types of Cisco ACLs. Configure standard ACLs in a medium-size enterprise branch office network, including defining filtering criteria, configuring standard ACLs to filter traffic, and applying standard ACLs to router interfaces,...

86p youcanletgo_01 04-01-2016 58 5   Download

After completing this chapter, students will be able to: Describe the features and operation of EIGRP, examine the different EIGRP packet formats, calculate the composite metric used by DUAL, describe the concepts and operation of DUAL, examine the commands to configure and verify basic EIGRP operations for IPv4 and IPv6.

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This chapter describe the primary functions and features of a router, explain how routers use information in data packets to make forwarding decisions in a small to medium-sized business network, explain the encapsulation and de-encapsulation process used by routers when switching packets between interfaces,...

54p youcanletgo_01 29-12-2015 40 2   Download

This chapter describe the features and operation of EIGRP, examine the different EIGRP packet formats, calculate the composite metric used by DUAL, describe the concepts and operation of DUAL, examine the commands to configure and verify basic EIGRP operations for IPv4 and IPv6.

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Chapter 1 introduce to Routing and Packet Forwarding. This chapter identify a router as a computer with an OS and hard ware designed for the routing process. Demonstrate the ability to configure devices and apply addresses. Describe the structure of a routing table. Describe how a router determines a path and switches packets.

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Topology A Cisco 1841 router has the following interfaces: Two Fast Ethernet interfaces: FastEthernet 0/0 and FastEthernet 0/1 Two serial interfaces: Serial 0/0/0 and Serial0/0/1 l The interfaces on your routers can vary. Packet Tracer Activities are referenced throughout these chapters for additional practices.Unlike most user PCs, a router will have multiple network interfaces. l These interfaces can include a variety of connectors.

110p vanmanh1008 21-05-2013 66 5   Download

Type: OSPF packet type: Hello (Type 1), DBD (Type 2), LS Request (Type 3), LS Update (Type 4), LS ACK (Type 5). Router ID: ID of the originating router. Area ID: Area from which the packet originated. Network Mask: Subnet mask associated with the sending interface. Hello Interval: Number of seconds between the sending router’s Hellos. Router Priority: Used in DR/BDR election (discussed later). Designated Router (DR): Router ID of the DR, if any. Backup Designated Router (BDR): Router ID of the BDR, if any. List of Neighbors: Lists the OSPF Router ID of the neighboring router(s)...

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Chapter 11 OSPF quangkien@gmail.com .For further information  This presentation is an overview of what is covered in the curriculum/book.  For further explanation and details, please read the chapter/curriculum.  Book: Routing Protocols and Concepts By Rick Graziani and Allan Johnson ISBN: 1-58713-206-0 ISBN-13: 978-58713206-3 2 .

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Link-State Routing Process 1. Each router learns about its own links, its own directly connected networks. (Interface is “up”) 2. Each router is responsible for meeting its neighbors on directly connected networks. (OSPF Hello packets) 3. Each router builds a link-state packet (LSP) containing the state of each directly connected link. (neighbor ID, link type, and bandwidth) 4. Each router floods the LSP to all neighbors, who then store all LSPs received in a database. Neighbors then flood the LSPs to their neighbors until all routers in the area have received the LSPs. 5.

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In our experiments, 42 MICAz nodes were used. The experimentswere conductedwith multiple randomly generated layouts under two different scenarios: (i) an open parking lot, and (ii) an indoor office. In each sce- nario, two types of experiments were conducted: Fixed Single Sender and Round Robin Sender. In the Fixed Single Sender experiment, the sender was placed in the center of the topology, while the other 41 nodes were randomly deployed as receivers. The sender broadcasted a packet in every 200ms. Each packet was identified by a sequence number.

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Before we describe the investigation process, we need to define the basic and fundamental concepts. There are few agreed upon definitions in the area of digital forensic research, so we will clearly state the definitions we are using, even the most basic ones. Digital data are data represented in a numerical form. With modern computers, it is common for the data to be internally represented in a binary encoding, but this is not a requirement. A digital object is a discrete collection of digital data, such as a file, a hard disk sector, a network packet, a memory page, or a process....

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