PC Maintenance: Preparing for A+ Certification
... Open Systems Interconnection Reference model for discussing networking Explains how a network operates Helps when troubleshooting network problems ...
... Open Systems Interconnection Reference model for discussing networking Explains how a network operates Helps when troubleshooting network problems ...
Document
... To understand a particular protocol stack, both the payload and delivery protocol sets must be understood Protocol encapsulation that is carried out by conventional layered protocols, in accordance with the OSI model or TCP/IP model should not be considered as tunneling ...
... To understand a particular protocol stack, both the payload and delivery protocol sets must be understood Protocol encapsulation that is carried out by conventional layered protocols, in accordance with the OSI model or TCP/IP model should not be considered as tunneling ...
What is data communication? - Information Systems
... • Host – a machine on the network; • End system/end point – a machine “on the edge” of the network, rather than an “internal” (switching) node; • Subnet – sub network, a subset of the whole network; – Also used to refer to the internal “routing” part of a network. ...
... • Host – a machine on the network; • End system/end point – a machine “on the edge” of the network, rather than an “internal” (switching) node; • Subnet – sub network, a subset of the whole network; – Also used to refer to the internal “routing” part of a network. ...
Exploring the network
... Ethernet is 100Mbps Throughput is 85Mbps If traffic overhead is 15Mbps, then goodput is 70Mbps ...
... Ethernet is 100Mbps Throughput is 85Mbps If traffic overhead is 15Mbps, then goodput is 70Mbps ...
DARPA AnD the InteRnet RevolutIon
... for each postcard to be mailed inside an envelope addressed in the local language – and then, when it crossed the border, moved into a new envelope addressed in the new local language? End of problem: The local mail sorters would read Kanji in Japan, English in the United States, Arabic in the Middl ...
... for each postcard to be mailed inside an envelope addressed in the local language – and then, when it crossed the border, moved into a new envelope addressed in the new local language? End of problem: The local mail sorters would read Kanji in Japan, English in the United States, Arabic in the Middl ...
02_Network_layer_models
... With the functions chosen international defined protocols and standards should used if possible There should be as much layers implemented as there is no need left for additional layers Hierarchical arrangement of entities that may communicate with peer entities in another system ...
... With the functions chosen international defined protocols and standards should used if possible There should be as much layers implemented as there is no need left for additional layers Hierarchical arrangement of entities that may communicate with peer entities in another system ...
No Slide Title
... Network File System (NFS): • NFS is a distributed file system protocol suite developed by Sun Microsystems that allows file access to a remote storage device such as a hard disk across a network. ...
... Network File System (NFS): • NFS is a distributed file system protocol suite developed by Sun Microsystems that allows file access to a remote storage device such as a hard disk across a network. ...
Network Address Translation (NAT)
... • Individual hosts inside the Firewall are identified based on of each connection flowing through the firewall. • Since a connection doesn’t exist until an internal host requests a connection through the firewall to an external host, and most Firewalls only open ports only for the addressed host onl ...
... • Individual hosts inside the Firewall are identified based on of each connection flowing through the firewall. • Since a connection doesn’t exist until an internal host requests a connection through the firewall to an external host, and most Firewalls only open ports only for the addressed host onl ...
ppt
... Introspective mobile code/data support for legacy / new apps Provides dynamic placement of data and service components MINO E-mail application on OceanStore / Planet Lab ...
... Introspective mobile code/data support for legacy / new apps Provides dynamic placement of data and service components MINO E-mail application on OceanStore / Planet Lab ...
Network Address Translation
... • Individual hosts inside the Firewall are identified based on of each connection flowing through the firewall. • Since a connection doesn’t exist until an internal host requests a connection through the firewall to an external host, and most Firewalls only open ports only for the addressed host onl ...
... • Individual hosts inside the Firewall are identified based on of each connection flowing through the firewall. • Since a connection doesn’t exist until an internal host requests a connection through the firewall to an external host, and most Firewalls only open ports only for the addressed host onl ...
Network Layer
... fragment the datagram. If it cannot pass the datagram though any available physical network, it discards the datagram and sends and ICMP error message to the source host. If the value is 0, this means that whenever required the datagram can be fragmented according to the requirement of the physical ...
... fragment the datagram. If it cannot pass the datagram though any available physical network, it discards the datagram and sends and ICMP error message to the source host. If the value is 0, this means that whenever required the datagram can be fragmented according to the requirement of the physical ...
BCS THE CHARTERED INSTITUTE FOR IT COMPUTER NETWORKS BCS HIGHER EDUCATION QUALIFICATIONS
... transmitted using Manchester encoding. (4 marks) ...
... transmitted using Manchester encoding. (4 marks) ...
lecture
... SLIP (Serial Line IP) • First protocol for sending IP datagrams over dial-up links (from 1988) • Encapsulation, not much else ...
... SLIP (Serial Line IP) • First protocol for sending IP datagrams over dial-up links (from 1988) • Encapsulation, not much else ...
CSCI-1680 :: Computer Networks
... IMPs – Late 1960’s – RFC 1, 1969! – Segmentation, framing, routing, reliability, reassembly, flow control ...
... IMPs – Late 1960’s – RFC 1, 1969! – Segmentation, framing, routing, reliability, reassembly, flow control ...
Dan's slide set
... Note: things sent in the network layer are normally called packets, whereas things sent in the transport layer are normally called messages. ...
... Note: things sent in the network layer are normally called packets, whereas things sent in the transport layer are normally called messages. ...
Network
... Original approach (ARPANET, 1970’s): – File hosts.txt listed all hosts and their IP addresses. – Every night every host fetches file from central repository. – OK for a few hundred hosts. – Scalability? • File size. • Centrally managed. ...
... Original approach (ARPANET, 1970’s): – File hosts.txt listed all hosts and their IP addresses. – Every night every host fetches file from central repository. – OK for a few hundred hosts. – Scalability? • File size. • Centrally managed. ...
G805 Introduction
... analog channels and 64 kbps digital channels did not have mechanisms to check signal validity and quality thus major faults could go undetected for long periods of time hard to characterize and localize faults when reported minor defects might be unnoticed indefinitely as PDH networks evolved, ...
... analog channels and 64 kbps digital channels did not have mechanisms to check signal validity and quality thus major faults could go undetected for long periods of time hard to characterize and localize faults when reported minor defects might be unnoticed indefinitely as PDH networks evolved, ...
network
... that generated the datagram. Header checksum: verifies header integrity; computed at each hop. Source and destination address: IP addresses of source and destination. Options: way of extending the protocol. ...
... that generated the datagram. Header checksum: verifies header integrity; computed at each hop. Source and destination address: IP addresses of source and destination. Options: way of extending the protocol. ...
Chapter 2: Networking Standards and the OSI Model
... • Includes raw data (payload), sender’s and receiver’s network addresses, error checking and control ...
... • Includes raw data (payload), sender’s and receiver’s network addresses, error checking and control ...
9781423902454_PPT_ch02 - Advanced Computer Maintenance
... • Includes raw data (payload), sender’s and receiver’s network addresses, error checking and control ...
... • Includes raw data (payload), sender’s and receiver’s network addresses, error checking and control ...
History_of_internet_1
... technology. The first email programs called SNDMSG and READMAIL are written by Ray Tomlinson marking the beginning of one of the most widely used applications today. ...
... technology. The first email programs called SNDMSG and READMAIL are written by Ray Tomlinson marking the beginning of one of the most widely used applications today. ...
Network designers - ECSE - Rensselaer Polytechnic Institute
... completeness and overall system costs. It allows a cost-performance tradeoff If implementation of function in higher levels is not possible due to technological/economic reasons, then it may be placed at lower levels Eg: telephone network in early 1900s could not provide the complex end-system ...
... completeness and overall system costs. It allows a cost-performance tradeoff If implementation of function in higher levels is not possible due to technological/economic reasons, then it may be placed at lower levels Eg: telephone network in early 1900s could not provide the complex end-system ...
Slide 1
... Sample Question: CIDR (cont.) B. Assume that the ISP router forwards to the router 1 an IP packet that has the destination address 139.200.1.135. Which subnet will the packet be forwarded to? Based on the routing table in (1), what is the interface that the router 1 will forward the packet ...
... Sample Question: CIDR (cont.) B. Assume that the ISP router forwards to the router 1 an IP packet that has the destination address 139.200.1.135. Which subnet will the packet be forwarded to? Based on the routing table in (1), what is the interface that the router 1 will forward the packet ...
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).