Application Layer Protocols

Bài giảng Mạng máy tính - Chương 2: Giao thức tầng ứng dụng trình bày một số khái niệm và nguyên tắc, Web & Hyper text transfer protocol, web design and HTTP, Web programming. Mời các bạn cùng tham khảo nội dung chi tiết.

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Chapter 5 - Wireless security. After studying this chapter you will be able to understand: Wireless concepts, Securing digital cellular telephony, wireless application protocol, wireless transport layer security, hardening wireless local area networks, IEEE 802.11, wired equivalent privacy (WEP).

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Real-time Transport Protocol (RTP) is the protocol designed to handle real-time traffic on the Internet. RTP does not have a delivery mechanism (multicasting, port numbers, and so on); it must be used with UDP. RTP stands between UDP and the application program. The main contributions of RTP are timestamping, sequencing, and mixing facilities. This chapter provides knowledge of RTP and RTCP.

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In this chapter we discuss our first client/server application program, Dynamic Host Configuration Protocol (DHCP). This application is discussed first because it is the first client/server application program that is used after a host is booted. In other words, it serves as a bootstrap when a host is booted and supposed to be connected to the Internet, but the host does not know its IP address.

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Upon completion you will be able to: Differentiate between a unicast, multicast, and broadcast message; know the many applications of multicasting; understand multicast link state routing and MOSPF; understand multicast link state routing and DVMRP; understand the Core-Based Tree Protocol; understand the Protocol Independent Multicast Protocols; understand the MBONE concept.

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This chapter is an introduction to the application layer. In the next eight chapters we introduce common client-server applications used in the Internet. In this chapter, we give a general picture of how a client-server program is designed and give some simple codes of their implementation. The area of network programming is a very vast and complicated one; it cannot be covered in one chapter. We need to give a bird’s-eye view of this discipline to make the contents of the next eight chapters easier to understand.

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 Bài giảng "Mạng máy tính - Chương 2: Giao thức tầng ứng dụng (application layer)" cung cấp cho người học các kiến thức: File Transfer Protocol, Domain Name System, Electronic Mail Protocols. Mời các bạn cùng tham khảo nội dung chi tiết.

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 Bài giảng "Mạng máy tính - Chương 2: Giao thức tầng ứng dụng (application layer)" cung cấp cho người học các kiến thức: Một số khái niệm và nguyên tắc, Web & Hyper Text Transfer Protocol, Web design and HTTP, Web programming. Mời các bạn cùng tham khảo.

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This chapter objectives: Describe how the functions of the three upper OSI model layers provide network services to end user applications, describe how the TCP/IP Application Layer protocols provide the services specified by the upper layers of the OSI model, define how people use the Application Layer to communicate across the information network,...

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This chapter explain the role of Transport Layer protocols and services in supporting communications across data networks, analyze the application and operation of TCP mechanisms that support reliability, analyze the application and operation of TCP mechanisms that support reassembly and manage data loss, analyze the operation of UDP to support communicate between two processes on end devices.

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This chapter explain how the functions of the application layer, session layer, and presentation layer work together to provide network services to end user applications; describe how common application layer protocols interact with end user applications; describe, at a high level, common application layer protocols that provide Internet services to end-users, including WWW services and email;...

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Chương 2 trang bị cho người học những hiểu biết về giao thức tầng ứng dụng (application layer). Trong chương này các bạn sẽ cùng tìm hiểu về một số khái niệm và nguyên tắc; Web & Hyper Text Transfer Protocol; Web design and HTTP, Web programming;... Mời các bạn cùng tham khảo.

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Introduction Data link control layer – often abbreviated simply to data link layer – is concerned with the transfer of data over a serial data link The transmission mode may be either asynchronous or synchronous and based on either a character-oriented or a bit-oriented transmission control protocol The data link layer is fundamental to the operation of all data communication applications

65p doanhung_dtvtk10 19-03-2013 76 8   Download

Client-Server Application Connection Oracle Net enables a network connection between a client and an Oracle database server. Oracle Net is a software component that resides on both the client and on the Oracle database server. It is layered on top of the network protocol. When a connection is initiated from a client to the Oracle database server, data is passed down a stack on the client, over the network, and up a similar stack to the Oracle database server.

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transport layer security service originally developed by Netscape version 3 designed with public input subsequently became Internet standard known as TLS (Transport Layer Security) uses TCP to provide a reliable end-to-end service SSL has two layers of protocols

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Security Service – a service provided by a protocol layer of communicating open systems, which ensures adequate security of the systems or of data transfers RFC 2828 – a processing or communication service that is provided by a system to give a specific kind of protection to system resources; security services implement security policies and are implemented bt security mechanisms.

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Raw Sockets let you program at just above the network (IP) layer You could program at the IP level using the IP API but you can’t get at ICMP Raw Sockets expose ICMP you get a Raw Packet and populate the entire packet yourself for high level protocols like TCP and UDP you lose all of the functionality implemented in those layers choosing to use a Raw Socket must be weighed carefully Raw Sockets can be dangerous Raw Sockets can be against the law http://www.kumite.com/rsnbrgr/rob/grcspoof/cnn/ ...

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Radio based communication, open air The attacker, having a radio transmitter and receiver with the same radio frequency of the underlying wireless network, can easily: Intercept wireless data Connect his computing devices to a nearby wireless network Inject new packets to an existing wireless network Jam a particular wireless channel using a jamming device Security measures Implement encryption algorithms, authentication algorithms, and integrity-check algorithms at the data-link layer Provide network access with wired equivalent privacy Higher-layer protocols and applications can be used ...

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Secure Socket Layer Protocol (SSL) Designed by Netscape in 1994 To protect WWW applications and electronic transactions Transport layer security protocol (TLS) A revised version of SSLv3 Two major components: Record protocol, on top of transport-layer protocols Handshake protocol, change-cipher-spec protocol, and alert protocol; they reside between application-layer protocols and the record protocol

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Encryption and authentication algorithms are building blocks of secure network protocols Deploying cryptographic algorithms at different layers have different security effects Where should we put the security protocol in the network architecture?

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