DATA COMMUNICATION (Basics of data communication‚ OSI layers.) K.K.DHUPAR SDE (NP-II) ALTTC ALTTC/NP/KKD/Data Communication 1 Data Communications History • 1838: Samuel Morse & Alfred Veil Invent Morse Code Telegraph System • 1876: Alexander Graham Bell invented Telephone • 1910:Howard Krum developed Start/Stop Synchronisation ALTTC/NP/KKD/Data Communication 2 History of Computing • 1930: Development of ASCII Transmission Code • 1945: Allied Governments develop the First Large Computer
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Q1. Compare between LAN‚ MAN and WAN? A LAN (local area network) is a group of computers and network devices connected together‚ usually within the same building. By definition‚ the connections must be high speed and relatively inexpensive (e.g.‚ token ring or Ethernet). Most Indiana University Bloomington departments are on LANs. A LAN connection is a high-speed connection to a LAN. On the IUB campus‚ most connections are either Ethernet (10 Mbps) or Fast Ethernet (100 Mbps)‚ and a few locations
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behavior.=protocol.*14_ is a way of breaking a large address space into more‚ smaller‚ address spaces.=subnetting.*15The four layers of the TCP/IP protocol suite are Application‚ ____‚ Internetwork‚ and Network Access=transport.*16Which layer of the OSI model is
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differences between OSI and TCP/IP reference models? Explain briefly. The main differences between the two models are as follows: - - OSI is a reference model and TCP/IP is an implementation of OSI model. - TCP/IP Protocols are considered to be standards around which the Internet has developed. The OSI model however is a “Generic‚ protocol-independent standard." - TCP/IP combines the presentation and session layer issues into its application layer. - TCP/IP combines the OSI data link and
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IT2301 ELECTRONIC COMMERCE UNIT – 1 INTRODUCTION Traditional Commerce and E-Commerce: Traditional Commerce: Traditional commerce perhaps started before recorded history when our ancestors first decided to specialise their everyday activities. Instead of each family unit having to grow crops‚ search for food‚ and make tools‚ families developed skills in one of these areas and traded some of their production for other needs. It started with bartering‚ which eventually gave
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Brandi Davis NT1210: Introduction to Networking_V1.0 > Week 1 > Submit Short Answer Assessment > Short Answer Key Networking Concepts and Terminology 1. What are open standards‚ and what‚ if any‚ are the advantages of such standards? Specifications for hardware or software that are developed by a standards organization or a consortium involved in supporting a standard. Available to the public for developing compliant products‚ open standards imply "open systems;" that an existing component in
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Chapter 3 Review 1. Which of the following is true about a TCP/IP network? A) The network uses only standards defined in TCP/IP RFCs. 2. Which of the following terms is not a common synonym for TCP/IP model? (Choose two answers.) D) TCP/IP mapping and C) Ethernet 3. Think generically about the idea of a networking standard‚ ignoring any particular standard or standards group. Which of the following is typically true of a standard? (Choose two answers.) B) It exists as a deployed network device
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SEMESTER 1 CHAPTER 2 Communicating over the Network V 4.0 2.0.1 What are the five aspects of the information network we will focus on in this course? 1-Devices that make up the network 2-Media that connect the devices 3-Messages that are carried across the network 4-Rules and processes that govern network communications 5-Tools and commands for constructing and maintaining networks 2.1.1 What are the three elements of communication? 1-message source‚ or sender 2-the destination
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generally function at the lower three layers of the OSI reference model: the physical layer‚ the data link layer‚ and the network layer. Figure 3-1 illustrates the relationship between the common WAN technologies and the OSI model. Internetworking Technologies Handbook 1-58705-001-3 3-1 Chapter 3 Point-to-Point Links Introduction to WAN Technologies Figure 3-1 WAN Technologies Operate at the Lowest Levels of the OSI Model OSI layers WAN specifications X.25 PLP Frame Relay
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the hierarchical network design model is refered to as the high-speed backbone of the internetwork‚ where high availability and redundancy are critical? core layer 2. Which two characteristics are associated with enterprise level switches? (Choose two.) high forwarding rate support link aggregation 3. Which feature supports higher throughput in switched networks by combining multiple switch ports? link aggregation 4. Which hierarchical design model layer controls the flow of network
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