What computers talk about and how. COS 116 4/6/2006
... Building reliability on top of unreliable protocols ...
... Building reliability on top of unreliable protocols ...
Information Systems and Networking I
... (A) Physical, Data link, Transport, Network, Session, Presentation, Application. (B) Physical, Data link, Network, Transport, Presentation, Session, Application. (C) Physical, Data link, Transport, Network, Presentation, Session, Application. (D) Physical, Data link, Network, Transport, Session, Pre ...
... (A) Physical, Data link, Transport, Network, Session, Presentation, Application. (B) Physical, Data link, Network, Transport, Presentation, Session, Application. (C) Physical, Data link, Transport, Network, Presentation, Session, Application. (D) Physical, Data link, Network, Transport, Session, Pre ...
lecture 9 - Philadelphia University
... Reviewing the TCP/IP Communications Flow Any time one computer needs to communicate with another, a sequence of steps is followed. For this example, we relate Web browsing to the TCP/IP communications flow. When a user at a computer wants to access a Web page, he or she typically starts a Web brows ...
... Reviewing the TCP/IP Communications Flow Any time one computer needs to communicate with another, a sequence of steps is followed. For this example, we relate Web browsing to the TCP/IP communications flow. When a user at a computer wants to access a Web page, he or she typically starts a Web brows ...
CSE524: Lecture 2
... – Host-to-Host protocol standard for two ends to talk to each other – NCP (Network Control Protocol) defined (Dec. 1970) – Precursor to TCP – Deployed from 1971-1972 – Allows applications to be developed on top of network ...
... – Host-to-Host protocol standard for two ends to talk to each other – NCP (Network Control Protocol) defined (Dec. 1970) – Precursor to TCP – Deployed from 1971-1972 – Allows applications to be developed on top of network ...
Key Terms
... • A router can determine the best path for data transmission and perform advanced management functions • Routers operate at the Network layer or higher of the OSI Model • Routers are intelligent, protocol-dependent devices. ...
... • A router can determine the best path for data transmission and perform advanced management functions • Routers operate at the Network layer or higher of the OSI Model • Routers are intelligent, protocol-dependent devices. ...
The Transport Layer
... A state diagram for a simple connection management scheme. Transitions labeled in italics are caused by packet arrivals. The solid lines show the client's state sequence. The dashed lines show the server's state sequence. ...
... A state diagram for a simple connection management scheme. Transitions labeled in italics are caused by packet arrivals. The solid lines show the client's state sequence. The dashed lines show the server's state sequence. ...
photo.net Introduction
... New layer presents a different network protocol Protocol - a contract by which all users of a network must abide e.g., Ethernet, TCP/IP, Appletalk, 802.11b ...
... New layer presents a different network protocol Protocol - a contract by which all users of a network must abide e.g., Ethernet, TCP/IP, Appletalk, 802.11b ...
A. Introduction
... • Network Access Layer —exchange of data between an end system and attached network — concerned with issues like : • destination address provision • invoking specific services like priority • access to & routing data across a network link • allows layers above to ignore link specifics g. babic ...
... • Network Access Layer —exchange of data between an end system and attached network — concerned with issues like : • destination address provision • invoking specific services like priority • access to & routing data across a network link • allows layers above to ignore link specifics g. babic ...
Email Slides - University of San Francisco
... Internet & E-mail Mary Vattavayalil University of San Francisco ...
... Internet & E-mail Mary Vattavayalil University of San Francisco ...
IP_tec - iptel.org
... • Switch/gateway/router: move bits between links, forming internetwork – IP router receives a packet from one interface and sends it out over another ...
... • Switch/gateway/router: move bits between links, forming internetwork – IP router receives a packet from one interface and sends it out over another ...
MM_Introduction
... • Switch/gateway/router: move bits between links, forming internetwork – IP router receives a packet from one interface and sends it out over another ...
... • Switch/gateway/router: move bits between links, forming internetwork – IP router receives a packet from one interface and sends it out over another ...
Ch Ext 10
... Q2: What is a communications protocol? Q3: What are the functions of the five TCP/IP— OSI layers? ...
... Q2: What is a communications protocol? Q3: What are the functions of the five TCP/IP— OSI layers? ...
Book Title - Computer Science
... network is a set of devices (often referred to as nodes) connected by communication links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network. ...
... network is a set of devices (often referred to as nodes) connected by communication links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network. ...
- Home - KSU Faculty Member websites
... administrator to provide broadcast containment, and low-level security on the LAN. • Subnet addresses include the Class A, Class B, and Class C network portion, plus a subnet field and a host field. The subnet field and the host field are created from the original host portion of the major IP addres ...
... administrator to provide broadcast containment, and low-level security on the LAN. • Subnet addresses include the Class A, Class B, and Class C network portion, plus a subnet field and a host field. The subnet field and the host field are created from the original host portion of the major IP addres ...
The Internet and TCP/IP Phones OFF Please Brian Bramer Home: www.cse.dmu.ac.uk/~bb
... • An organisation may be assigned one IP address (or a small number) yet have many machines, e.g. an domestic ADSL line is assigned one IP address yet a house may have four or five PCs. • NAT is an Internet standard that enables a LAN to use one set of IP addresses for internal traffic and a second ...
... • An organisation may be assigned one IP address (or a small number) yet have many machines, e.g. an domestic ADSL line is assigned one IP address yet a house may have four or five PCs. • NAT is an Internet standard that enables a LAN to use one set of IP addresses for internal traffic and a second ...
The Internet and the World Wide Web
... electronic information exchange Open system protocols Any computer can communicate with other computers using the same protocols ...
... electronic information exchange Open system protocols Any computer can communicate with other computers using the same protocols ...
Congestion Control Algorithm - Computer Science and Engineering
... Fund. Concept: The network interface has a hardware address, and frames exchanged at the hardware level must be addressed to the correct interface. TCP/IP works with its own addresses (i.e., 32-bit IP addresses). Knowing a host’s IP addresses does not let the kernel (i.e., Ethernet driver) must know ...
... Fund. Concept: The network interface has a hardware address, and frames exchanged at the hardware level must be addressed to the correct interface. TCP/IP works with its own addresses (i.e., 32-bit IP addresses). Knowing a host’s IP addresses does not let the kernel (i.e., Ethernet driver) must know ...
Internet Protocols - NYU Computer Science Department
... What’s the Internet: a service view communication infrastructure enables distributed applications: WWW, email, games, e-commerce, database., voting, more? ...
... What’s the Internet: a service view communication infrastructure enables distributed applications: WWW, email, games, e-commerce, database., voting, more? ...
No Slide Title
... • This information can be used by higher-level protocols to recover from transmission problems. The ping program uses the ICMP echo request and reply packets to determine whether a particular IP system on a network is functional. The ping program can be used to diagnose IP network or router failur ...
... • This information can be used by higher-level protocols to recover from transmission problems. The ping program uses the ICMP echo request and reply packets to determine whether a particular IP system on a network is functional. The ping program can be used to diagnose IP network or router failur ...
for TCP
... 2 if you do not get the ack, the task was not completed • (Can’t do both at the same time and guarantee either both or neither were done.) • Example: database update (transaction “commit”) • “Probably impossible” (Saltzer, 1984) ...
... 2 if you do not get the ack, the task was not completed • (Can’t do both at the same time and guarantee either both or neither were done.) • Example: database update (transaction “commit”) • “Probably impossible” (Saltzer, 1984) ...
lecture02
... packets, can be potentially lost, can be potentially delivered out-of-order • What you may want: application-to-application (end-to-end) channel, communication stream, reliable, in-order delivery ...
... packets, can be potentially lost, can be potentially delivered out-of-order • What you may want: application-to-application (end-to-end) channel, communication stream, reliable, in-order delivery ...
TCP Review - Stanford University
... issues dealing with failures, RIP • Link State (Dijkstra’s) algorithm – global, broadcasts LSP, OSPF • Path Vector – next slide ...
... issues dealing with failures, RIP • Link State (Dijkstra’s) algorithm – global, broadcasts LSP, OSPF • Path Vector – next slide ...
physical address.
... An acknowledgment number for the segments received Segments carried across the internet inside of IP datagrams. ...
... An acknowledgment number for the segments received Segments carried across the internet inside of IP datagrams. ...
Internet protocol suite
The Internet protocol suite is the computer networking model and set of communications protocols used on the Internet and similar computer networks. It is commonly known as TCP/IP, because among many protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP) is the accepted and most widely used protocol in Internet. Often also called the Internet model, it was originally also known as the DoD model, because the development of the networking model was funded by DARPA, an agency of the United States Department of Defense.TCP/IP provides end-to-end connectivity specifying how data should be packetized, addressed, transmitted, routed and received at the destination. This functionality is organized into four abstraction layers which are used to sort all related protocols according to the scope of networking involved. From lowest to highest, the layers are the link layer, containing communication technologies for a single network segment (link); the internet layer, connecting hosts across independent networks, thus establishing internetworking; the transport layer handling host-to-host communication; and the application layer, which provides process-to-process application data exchange.The TCP/IP model and related protocol models are maintained by the Internet Engineering Task Force (IETF).