Download e-book for iPad: Guide to Computer Network Security (Computer Communications by Joseph Migga Kizza

Download e-book for iPad: Guide to Computer Network Security (Computer Communications by Joseph Migga Kizza

By Joseph Migga Kizza

This finished advisor exposes the protection hazards and vulnerabilities of laptop networks and networked units, supplying recommendation on constructing better algorithms and most sensible practices for reinforcing approach protection. totally revised and up to date, this re-creation embraces a broader view of laptop networks that encompasses agile cellular platforms and social networks. good points: presents helping fabric for academics and scholars, together with an instructor’s handbook, slides, strategies, and laboratory fabrics; comprises either fast and extra thought-provoking workouts on the finish of every bankruptcy; devotes a complete bankruptcy to laboratory routines; discusses flaws and vulnerabilities in computing device community infrastructures and protocols; proposes useful and effective ideas to protection matters; explores the position of laws, rules, and legislation enforcement in preserving computing device and computing device community protection; examines the influence of advancements in virtualization, cloud computing, and cellular platforms.

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Additional info for Guide to Computer Network Security (Computer Communications and Networks)

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The TCP/IP model does not exactly match the OSI model. For example, it has two to three fewer levels than the seven layers of the OSI model. 2 OSI datagrams seen in each layer with header added Header H1 H2 H3 H4 H5 No header Data Data Data Data Data Data Data Application Presentation Session Transport Network Data link Physical Defense Advanced Research Project Agency (DARPA), but over the years, it has seen a phenomenal growth in popularity, and it is now the de facto standard for the Internet and many intranets.

It provides a no-frills connectionless service with just delivery and no acknowledgments. But it is much more efficient and a protocol of choice for real-time data such as streaming video and music. Transport layer delivers transport layer packets and protocols to the network layer. 19 shows the TCP data structure, and Fig. 20 shows the UDP data structure. 3 TCP/IP layers Layer Application Delivery unit Message Transport Segment Network Datagram Data link Frame Physical Bit stream Protocols Handles all higher level protocols including File Transfer Protocol (FTP), Name Server Protocol (NSP), Simple Mail Transfer Protocol (SMTP), Simple Network Management Protocol (SNMP), HTTP, remote file access (telnet), remote file server (NFS), Name Resolution (DNS), HTTP, TFTP, SNMP, DHCP, DNS, BOOTP Combines application, session, and presentation layers of the OSI model Handles all high-level protocols Handles transport protocols including Transmission Control Protocol (TCP), User Datagram Protocol (UDP) Contains the following protocols: Internet Protocol (IP), Internet Control Message Protocol (ICMP), Internet Group Management Protocol (IGMP) Supports transmitting source packets from any network on the internetwork and makes sure they arrive at the destination independent of the path and networks they took to reach there Best path determination and packet switching occur at this layer Contains protocols that require IP packet to cross a physical link from one device to another directly connected device It included the following networks: WAN – wide area network LAN – local area network All network card drivers Fig.

This technique is referred to as data switching. The type of data-switching technique used by a network determines how messages are transmitted between the two communicating elements and across that network. There are two types of data-switching techniques: circuit switching and packet switching. 1 Circuit Switching In circuit-switching networks, one must reserve all the resources before setting up a physical communication channel needed for communication. The physical connection, once established, is then used exclusively by the two end systems, usually subscribers, 26 1 Computer Network Fundamentals Fig.

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