Chapter 36 Network Management & SNMP
... intermittent failures difficult to detect and isolate – Eg.a bad NIC card may lead to many retransmissions, ...
... intermittent failures difficult to detect and isolate – Eg.a bad NIC card may lead to many retransmissions, ...
William Stallings Data and Computer Communications
... Protocol Architecture • Framework about how a set of protocols work together to finish the communication task between source and destination • Three Protocol Architectures: - Three-Layer Model - TCP/IP Protocol Architecture - OSI Model ...
... Protocol Architecture • Framework about how a set of protocols work together to finish the communication task between source and destination • Three Protocol Architectures: - Three-Layer Model - TCP/IP Protocol Architecture - OSI Model ...
Computer Network
... System for connecting computers using a single transmission technology Internet Set of networks connected by routers that are configured to pass traffic among any computers attached to any network in the set ...
... System for connecting computers using a single transmission technology Internet Set of networks connected by routers that are configured to pass traffic among any computers attached to any network in the set ...
Week15_2
... noticed a jam signal, stop, backoff. The time to backoff is picked randomly from [0,CW-1]. If collided again, double CW. Until CW is 1024. give up when tried 16 times. ...
... noticed a jam signal, stop, backoff. The time to backoff is picked randomly from [0,CW-1]. If collided again, double CW. Until CW is 1024. give up when tried 16 times. ...
Cleveland State University Department of Electrical and Computer Engineering EEC 484:Computer Networks
... 1. Operating Systems 2. Computer Organization 3. Data Structure and Algorithms ...
... 1. Operating Systems 2. Computer Organization 3. Data Structure and Algorithms ...
sec overview
... Source routing option specifies route instead of routers - Theory: useful in broken routing environment - Practice: used by hackers to circumvent security measures ...
... Source routing option specifies route instead of routers - Theory: useful in broken routing environment - Practice: used by hackers to circumvent security measures ...
15-744: Computer Networking
... • Module in layered structure • Set of rules governing communication between network elements (applications, hosts, routers) • Protocols define: • Interface to higher layers (API) • Interface to peer • Format and order of messages • Actions taken on receipt of a message ...
... • Module in layered structure • Set of rules governing communication between network elements (applications, hosts, routers) • Protocols define: • Interface to higher layers (API) • Interface to peer • Format and order of messages • Actions taken on receipt of a message ...
Chapter 4
... – Reduces potential for errors in assigning IP addresses – Enables users to move workstations and printers without having to change TCP/IP configuration – Makes IP addressing transparent for mobile users ...
... – Reduces potential for errors in assigning IP addresses – Enables users to move workstations and printers without having to change TCP/IP configuration – Makes IP addressing transparent for mobile users ...
What is a protocol?
... The protocol that was used in the original ARPAnet, the 1822 protocol, was inadequate for this and another protocol, NCP, was devised and implemented. By 1973 it became clear that NCP was inadequate to handle the volume of data that was being generated. In 1974 two researchers, Vincent Cerf and R ...
... The protocol that was used in the original ARPAnet, the 1822 protocol, was inadequate for this and another protocol, NCP, was devised and implemented. By 1973 it became clear that NCP was inadequate to handle the volume of data that was being generated. In 1974 two researchers, Vincent Cerf and R ...
Protocols and the tcp/ip suite
... ELEMENTS OF STANDARDIZATION WITHIN OSI FRAMEWORK • Protocol Specification – Format of protocol data units (PDUs) exchanged – Semantics of all fields – Allowable sequence of PDUs ...
... ELEMENTS OF STANDARDIZATION WITHIN OSI FRAMEWORK • Protocol Specification – Format of protocol data units (PDUs) exchanged – Semantics of all fields – Allowable sequence of PDUs ...
How the Internet works
... • Compare with the old-style telephone networks – designed top-down by companies like AT&T, who built the network of telephone lines, and wanted (and had) complete control over their use – good aspect of design: • old handsets did not need electrical power • energy for dial-tone and speakers came f ...
... • Compare with the old-style telephone networks – designed top-down by companies like AT&T, who built the network of telephone lines, and wanted (and had) complete control over their use – good aspect of design: • old handsets did not need electrical power • energy for dial-tone and speakers came f ...
William Stallings Data and Computer Communications
... • Developed by the US Defense Advanced Research Project Agency (DARPA) for its packet switched network (ARPANET) • Used by the global Internet • No official model but a working one. ...
... • Developed by the US Defense Advanced Research Project Agency (DARPA) for its packet switched network (ARPANET) • Used by the global Internet • No official model but a working one. ...
Document
... How do we distribute functionality across devices? ◦ Example: who is responsible for security? ...
... How do we distribute functionality across devices? ◦ Example: who is responsible for security? ...
COS 461: Computer Networks Spring 2009 (MW 1:30‐2:50 in CS 105) Mike Freedman Teaching Assistants: WyaI Lloyd and Jeff Terrace
... – Ordered, reliable byte stream – Simultaneous transmission in both direcWons ...
... – Ordered, reliable byte stream – Simultaneous transmission in both direcWons ...
Ethernet, IP and TCP - Open Library Society, Inc.
... and a host component. – Class A address a binary number that starts with 0, then has 7bit for network information and 24 for the host on that network – Class B address is a binary number that starts with 10, then has 14 bit for the network and then 16 bits for the host. – Class C address is a binary ...
... and a host component. – Class A address a binary number that starts with 0, then has 7bit for network information and 24 for the host on that network – Class B address is a binary number that starts with 10, then has 14 bit for the network and then 16 bits for the host. – Class C address is a binary ...
Midterm Answers
... Protocols: IP and IPX (a Novell network protocol that is not around much any more). ATM also provides some network layer functionality; it's usually considered as lying between layers. You could also mention IPv6, but that's still IP. Transport: ...
... Protocols: IP and IPX (a Novell network protocol that is not around much any more). ATM also provides some network layer functionality; it's usually considered as lying between layers. You could also mention IPv6, but that's still IP. Transport: ...
OSI Model
... end conversations (called sessions) between applications. This layer requests for a logical connection to be established on an end-user’s request. Any necessary log-on or password validation is also handled by this layer. Session layer is also responsible for terminating the connection. This layer p ...
... end conversations (called sessions) between applications. This layer requests for a logical connection to be established on an end-user’s request. Any necessary log-on or password validation is also handled by this layer. Session layer is also responsible for terminating the connection. This layer p ...
Internet Protocol, IP Addressing and Datagrams
... The IP Address Hierarchy • Every host is assigned a globally unique 32-bit address for identification • Each 32-bit address is divided into two distinct parts – prefix: physical network to which a host is attached, also known as network number – suffix: a host attached to a given physical network, ...
... The IP Address Hierarchy • Every host is assigned a globally unique 32-bit address for identification • Each 32-bit address is divided into two distinct parts – prefix: physical network to which a host is attached, also known as network number – suffix: a host attached to a given physical network, ...
Powerpoint
... 1973 – Ethernet was designed in 1973 by Bob Metcalfe at Xerox Palo Alto Research Center (PARC) How do we connect these networks together? ...
... 1973 – Ethernet was designed in 1973 by Bob Metcalfe at Xerox Palo Alto Research Center (PARC) How do we connect these networks together? ...
Introduction to Distributed Systems & Networking
... • Physical Layer: electrical details of bits on the wire • Data Link: sending “frames” of bits and error detection • Network Layer:” routing packets to the destination • Transport Layer: reliable transmission of messages, disassembly/assembly, ordering, retransmission of lost packets ...
... • Physical Layer: electrical details of bits on the wire • Data Link: sending “frames” of bits and error detection • Network Layer:” routing packets to the destination • Transport Layer: reliable transmission of messages, disassembly/assembly, ordering, retransmission of lost packets ...
Virtual Private Network
... using a dedicated connection such as leased line, a VPN uses “virtual” connections routed though the internet. ...
... using a dedicated connection such as leased line, a VPN uses “virtual” connections routed though the internet. ...
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).