Network protocols - VCE IT Lecture Notes
... Sometimes there is more than one choice of protocol for a task, such as how messages pass across a network (IPX/SPX vs TCP/IP, POP vs IMAP). As long as all the connected computers use the same protocol, it really does not matter which protocol is used (like diplomats agreeing on a language for negot ...
... Sometimes there is more than one choice of protocol for a task, such as how messages pass across a network (IPX/SPX vs TCP/IP, POP vs IMAP). As long as all the connected computers use the same protocol, it really does not matter which protocol is used (like diplomats agreeing on a language for negot ...
A Brief History of the Internet
... Can withstand large scale destruction (such as nuclear attack—remember that this was the time of the Cold War). ...
... Can withstand large scale destruction (such as nuclear attack—remember that this was the time of the Cold War). ...
ppt - Computer Science Division - University of California, Berkeley
... Need to create public Internet service providers - Back to the future..... ...
... Need to create public Internet service providers - Back to the future..... ...
Traffic Monitoring using sFlow
... Packet sampling has been used to monitor network traffic for over ten years (see Figure 1). HewlettPackard first demonstrated network-wide monitoring using packet sampling of the University of Geneva and CERN networks at Telecom ‘91. This was followed up with the introduction of networking products ...
... Packet sampling has been used to monitor network traffic for over ten years (see Figure 1). HewlettPackard first demonstrated network-wide monitoring using packet sampling of the University of Geneva and CERN networks at Telecom ‘91. This was followed up with the introduction of networking products ...
Lect01
... • Like telephone it enables people to communicate. • Telephones enabled voice communication. Internet enables data communication. • Because it spans many countries Internet is called the global network. • Other networks were: BITNET, FIDONET, JANET, EARN. ...
... • Like telephone it enables people to communicate. • Telephones enabled voice communication. Internet enables data communication. • Because it spans many countries Internet is called the global network. • Other networks were: BITNET, FIDONET, JANET, EARN. ...
Ch10 - Protection Mechanism
... Most organizations with an Internet connection use some form of router between their internal networks and the external service provider ...
... Most organizations with an Internet connection use some form of router between their internal networks and the external service provider ...
Chapter 24 - William Stallings, Data and Computer
... User Control • access to service is controlled based on user’s identity Behavior Control • controls how a particular service can be used ...
... User Control • access to service is controlled based on user’s identity Behavior Control • controls how a particular service can be used ...
Assignment Group A1
... Have you ever thought about how your computer talks with others on a network? Would you like to listen to, or “sniff”, the conversation? Network engineers, system administrators, security professionals and, unfortunately, crackers have long used a tool that allows them to do exactly that. This nifty ...
... Have you ever thought about how your computer talks with others on a network? Would you like to listen to, or “sniff”, the conversation? Network engineers, system administrators, security professionals and, unfortunately, crackers have long used a tool that allows them to do exactly that. This nifty ...
Powerpoint
... Tim Berners-Lee: “Nothing can be perfect, but the Web could be a lot better. It would help is we had easy hypertext editors which let us make links between documents with the mouse. It would help if everyone with Web access also had some space they can write to -and that is changing nowadays as a l ...
... Tim Berners-Lee: “Nothing can be perfect, but the Web could be a lot better. It would help is we had easy hypertext editors which let us make links between documents with the mouse. It would help if everyone with Web access also had some space they can write to -and that is changing nowadays as a l ...
What are Packet Communications? What data will be exchanged in
... What are Packet Communications? Packet communications used for surfing the web of the cell-phone and mail is a communications method that divides transmission data into smaller segments called packets. Normal voice calls use the technology of circuit-switching communication where the time spent talk ...
... What are Packet Communications? Packet communications used for surfing the web of the cell-phone and mail is a communications method that divides transmission data into smaller segments called packets. Normal voice calls use the technology of circuit-switching communication where the time spent talk ...
Document
... : context switching time : memory bandwidth 0 : physical network transmission bandwidth i : max packet length of i-th layer I : packet header length of i-th layer ni : data length of i-th layer i : calling expense (routing,traffic control, error detecting, buffer management, connection maint ...
... : context switching time : memory bandwidth 0 : physical network transmission bandwidth i : max packet length of i-th layer I : packet header length of i-th layer ni : data length of i-th layer i : calling expense (routing,traffic control, error detecting, buffer management, connection maint ...
Interconnection Networks
... – IP : layer above interconnection network - routes datagram to destination machine – TCP : layer above IP - guaranees reliable, in-order delivery and prevents corruption of data ...
... – IP : layer above interconnection network - routes datagram to destination machine – TCP : layer above IP - guaranees reliable, in-order delivery and prevents corruption of data ...
CPSC 155a Lecture 3
... Network: handles hop-to-hop routing, at the unit of packets Transport: provides process-to-process semantics such as in-order-delivery and reliability, at the unit of messages • Top three layers are not well-defined, all have to do with application level abstractions such as transformation of differ ...
... Network: handles hop-to-hop routing, at the unit of packets Transport: provides process-to-process semantics such as in-order-delivery and reliability, at the unit of messages • Top three layers are not well-defined, all have to do with application level abstractions such as transformation of differ ...
A Brief Overview of VoIP Security By John McCarron Voice of
... (Roberts 2005). This allows you to save the files and play them back on a computer. Vomit, Voice over Misconfigured Internet Telephones, is an example of such a tool (Provos 2004). Typically eavesdropping is restricted to the subnet the phone is attached to and the path it takes to the destination. ...
... (Roberts 2005). This allows you to save the files and play them back on a computer. Vomit, Voice over Misconfigured Internet Telephones, is an example of such a tool (Provos 2004). Typically eavesdropping is restricted to the subnet the phone is attached to and the path it takes to the destination. ...
F07_Lecture1_Intro
... – Switches use the address in the packet to determine how to forward the packets – “Store and forward” ...
... – Switches use the address in the packet to determine how to forward the packets – “Store and forward” ...
ppt - The Stanford University InfoLab
... • Downside: One bad router in a certain place can really screw up a portion of the Internet This is often what crackers mean when they talk about “bringing down the internet” Bring down enough routers to really mess ...
... • Downside: One bad router in a certain place can really screw up a portion of the Internet This is often what crackers mean when they talk about “bringing down the internet” Bring down enough routers to really mess ...
ns - Pattern
... Research activities Phase 1: Studies, theoretical and simulative (SAM), to investigate energy efficient routing protocols ...
... Research activities Phase 1: Studies, theoretical and simulative (SAM), to investigate energy efficient routing protocols ...
Slides Topic 3
... finally to the global Internet. On the battlefield a communications network will sustain damage, so the DOD designed TCP/IP to be robust and automatically recover from any node or phone line failure. This design allows the construction of very large networks with less central management. However, be ...
... finally to the global Internet. On the battlefield a communications network will sustain damage, so the DOD designed TCP/IP to be robust and automatically recover from any node or phone line failure. This design allows the construction of very large networks with less central management. However, be ...
CHAP10 - Lyle School of Engineering
... • SECURITY: Exposure to Thieves & Vandals; Hackers Steal, Use Passwords; Not Yet Safe for Large Business Transactions • TECHNOLOGY: Lack of Uniform Standards; Transfer of Graphics, Video can be Costly • LEGAL ISSUES: Need More Laws Governing Electronic Commerce; Are email Contracts, Electronic Signa ...
... • SECURITY: Exposure to Thieves & Vandals; Hackers Steal, Use Passwords; Not Yet Safe for Large Business Transactions • TECHNOLOGY: Lack of Uniform Standards; Transfer of Graphics, Video can be Costly • LEGAL ISSUES: Need More Laws Governing Electronic Commerce; Are email Contracts, Electronic Signa ...
MIST Multicast Implementation Study
... host: computer running applications which use network (e.g.: H1 router: computer (often w/o applications-level programs) routing packets from input line to output line. (e.g., A->C) gateway: router directly connected to 2+ networks (e.g. A) network: set of node (hosts/routers/gateways) within single ...
... host: computer running applications which use network (e.g.: H1 router: computer (often w/o applications-level programs) routing packets from input line to output line. (e.g., A->C) gateway: router directly connected to 2+ networks (e.g. A) network: set of node (hosts/routers/gateways) within single ...
Fundamentals of Computer Networks ECE 478/578
... FTP: File Transfer Protocol HTTP: Hypertext Transport Protocol TFTP: Trivial File Transfer Protocol ...
... FTP: File Transfer Protocol HTTP: Hypertext Transport Protocol TFTP: Trivial File Transfer Protocol ...
r08-QoS - Computer Engineering
... • A congested DS node tries to protect packets with a lower drop precedence value from being lost by preferably discarding packets with a higher drop ...
... • A congested DS node tries to protect packets with a lower drop precedence value from being lost by preferably discarding packets with a higher drop ...
10 the internet and the new information technology infrastructure
... • Client/server computing is used to distribute power to desktop • Extend to desktop to includes mobile devices • Incorporates public infrastructure (telephone system, Internet, etc.) ...
... • Client/server computing is used to distribute power to desktop • Extend to desktop to includes mobile devices • Incorporates public infrastructure (telephone system, Internet, etc.) ...