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- Need to get your point across? Try Point-to-Point Protocol
- Point-to-Point Protocol can boost your network security and efficiency, but getting a handle on it can be a challenge. In this week's Consultant's Corner, Warren Heaton provides an overview of Cisco's implementation of PPP.Understanding the basics of Point-to-Point Protocol PPP is critical for network administrators. As more and more sensitive...
- Tags: NETWORKING, SECURITY, Warren Heaton, PPP, authentication, Link Control Protocol, Point-to-Point Protocol, network, password, Multilink PPP, Network Control Protocol
- Technical articles 2000-07-27
Additional Resources
- Multiple Layer Error Control Over Wireless Links
- This paper compares the wireless performance of TCP with or without selective acknowledgments and in the presence or absence of a reliable link layer protocol, in order to determine whether link layer error control remains beneficial for TCP variants with improved error recovery capabilities, such as TCP SACK. The paper...
- Tags: Performance, TCP, Error, Wireless, Tcp/Ip, Performance Management, Networking, Human Resources, Workforce Management
- White papers 2007-03-01
- Performance Analysis of TFRC Over Wireless Link With Truncated Link-Level ARQ
- In this paper, an analytical framework is proposed for evaluating the Quality of Service QoS of TCP-Friendly Rate Control protocol TFRC in hybrid wireless/wired networks. For the wireless network, a link-level truncated Automatic Repeat reQuest ARQ scheme is deployed to reduce the packet losses visible to the transport layer protocol....
- Tags: QoS, Performance, Network, Protocol, IEEE, Wi-Fi, Wireless, Networking
- White papers 2006-06-01
- Network Infrastructure Consolidation With Host Integration Server 2004
- Microsoft Host Integration Server HIS 2004 offers a number of technologies to integrate open Transmission Control Protocol/Internet Protocol (TCP/IP) and IBM Systems Network Architecture SNA networks. These technologies include a new Internet Protocol-Data Link Control (IP-DLC) Link Service in support of the industry-popular SNA over IP routing Enterprise Extender. IP-DLC...
- Tags: Network Infrastructure, Network, Consolidation, Microsoft Host Integration Server, Microsoft Corp., SNA, Networking
- Webcasts
- Influence of Power Control and Link-Level Retransmissions on Wireless TCP
- A fundamental assumption of the tcp protocol is that packet losses indicate congestion on the network. This is a problem when using tcp over wireless links, because a noisy radio transmission may erroneously indicate congestion and thereby reduce the tcp sending rate. Two partial solutions, that improve the quality of...
- Tags: Radio, TCP, Wireless, Tcp/Ip, Networking
- White papers 2007-01-01
- Equilibrium and Fairness of Networks Shared by TCP Reno and Vegas/FAST
- It has been proved theoretically that a network with heterogeneous congestion control algorithms that react to different congestion signals can have multiple equilibrium points. This paper demonstrates this experimentally using TCP Reno and Vegas/FAST. It also shows that any desired inter-protocol fairness is in principle achievable by an appropriate choice...
- Tags: Network, TCP, Springer Science+Business Media, Fairness, Tcp/Ip, Networking
- White papers 2005-12-20
- Making Retransmission Delays in Wireless Links Friendlier to TCP
- Heterogeneous communication networks with their variety of application demands, uncertain time-varying traffic load, and mixture of wired and wireless links pose several challenging problem in modeling and control. This paper focuses on the packet delay, which is a particularly important variable for efficient end-to-end congestion control. In particular, the paper...
- Tags: TCP, Delay, Tcp/Ip, Research & Development, Networking, Wi-Fi, Wireless, Business Operations
- White papers 2007-01-01
- MPLS in Optical Networks
- An analysis of the features of MPLS and Generalized MPLS and their application to Optical Networks, with reference to the Link Management Protocol and Optical UNI.With the success of MPLS in packet switched IP networks, optical network providers have driven a process to generalize the applicability of MPLS to ...
- Tags: Optical Network, MPLS, Fiber Optics, Networking, Optical Networking, Network Technology, Telecommunications
- White papers 2001-07-12
- Protecting Transmissions When Using Power Control on 802.11 Ad Hoc Networks
- This paper presents the ALCA Asymmetric Link Collision Avoidance protocol. ALCA was designed to deal with a known deficiency of the Basic Scheme Gomez et al., 2001 for power control in 802.11 ad hoc networks, which occurs when links become asymmetrical as a result of power control. The proposed ALCA...
- Tags: IEEE 802.11, Advertisement, ALCA Mechanism, Wireless LANs, Wi-Fi, Wireless
- White papers
- Performance Evaluation of a Multicast Congestion Control Protocol
- This paper presents a performance evaluation of the CIFL congestion control protocol for layered multicast transmission. The paper presents an overview of the protocol, whose performance is then considered in a real testbed. Protocol dynamics, robustness and TCP-friendliness are investigated in an environment carrying a layered video stream and experiencing...
- Tags: Performance, Congestion, Protocol, Performance Evaluation, Performance Management, Team Management, Human Resources, Workforce Management, Management
- White papers 2007-01-01
- Cisco Security Advisory: Cisco Telnet Denial of Service Vulnerability
- A specifically crafted Transmission Control Protocol TCP connection to a telnet or reverse telnet port of a Cisco device running Internetwork Operating System IOS may block further telnet, reverse telnet, Remote Shell RSH, Secure Shell SSH, and in some cases Hypertext Transport Protocol HTTP access to the Cisco device. Data...
- Tags: Denial Of Service, Security, Vulnerability, SSH, Cisco Systems Inc., Telnet, Networking
- White papers 2004-10-31
- Cisco White Paper: How to Configure Cisco's Core SIP Products
- The Session Initiation Protocol SIP is a signaling protocol used to negotiate, establish, and terminate multimedia sessions such as voice calls. It is a peer-to-peer technology, similar to H.323, where endpoints possess the capability to initiate and receive sessions without the assistance of a call-processing agent such as those used...
- Tags: SIP, Cisco Systems Inc., Session Initiation Protocol (SIP), Emerging Technologies
- White papers 2003-09-09
- Cisco - Converting a Cisco 7940/7960 CallManager Phone to a SIP Phone and the Reverse Process
- Cisco 7940/7960 IP phones can support either the Skinny Call Control Protocol SCCP to run with Cisco CallManager, the Session Initiation Protocol or the Media Gateway Control Protocol MGCP, but not more than one simultaneously. This is possible because they load different firmware versions on bootup. This functionality is transparent...
- Tags: SIP, Cisco Systems Inc., Session Initiation Protocol (SIP), Emerging Technologies
- White papers 2004-12-15
- Improving TCP Performance Over Wireless WANs Using TCP/IP-Friendly Link Layer
- This paper proposes the use of a TCP/IP-friendly link level error recovery mechanism with novel design in conjunction with state-of-the-art Transmission Control Protocol TCP enhancements to improve TCP performance on network paths involving Wireless Wide-Area Network (W-WAN) links. It shows that by combining a selected set of TCP enhancements TCP...
- Tags: Wireless WAN, TCP, WAN, Wireless, Tcp/Ip, Networking, Network Technology
- White papers 2007-01-01
- Use and Configure a Summary Link Web Part or a Summary Link Field Control
- A Summary Link Web Part (Web Part: A modular unit of information that consists of a title bar, a frame, and content. Web Parts are the basic building blocks of a Web Part Page.) and a Summary Link field control both provide an easy way to build a page of...
- Tags: Web, Channel Management, Marketing
- White papers
- LLTD: Link Layer Topology Discovery Protocol
- This paper describes how the Link Layer Topology Discovery LLTD protocol operates over wired (802.3 Ethernet) and wireless (802.11) media. As the protocol name suggests, the core functions of LLTD enable applications to discover the topology of a network. In addition, LLTD has optional QoS Extensions that applications can use...
- Tags: Network, Protocol, Microsoft Corp., Link Layer Topology Discovery, Ethernet, Wi-Fi, Wireless, Networking
- White papers 2006-09-15
- Cryptanalysis of Microsoft's Point-to-Point Tunneling Protocol (PPTP)
- The Point-to-Point Tunneling Protocol PPTP is used to secure PPP connections over TCP/IP links. In this paper we analyze Microsoft's Windows NT implementation of PPTP. We show how to break both the challenge/response authentication protocol Microsoft CHAP and the RC4 encryption protocol MPPE, as well...
- Tags: PPTP, Microsoft Corp., VPNs, Network Security, Networking
- White papers
- OSPF Design Guide
- The Open Shortest Path First OSPF protocol is an Interior Gateway Protocol used to distribute routing information within a single Autonomous System. OSPF protocol was developed due to a need in the internet community to introduce a high functionality non-proprietary Internal Gateway Protocol IGP for the TCP/IP protocol family. The...
- Tags: Open Shortest Path First, Open Shortest Path First Protocol
- White papers 2006-04-06
- RemoteComputer (exe)
- RemoteComputer is a remote control software based on the TCP/IP protocol, including screen control, mouse, and keyboard simulation, File Transfer Protocol, and net phone. The client can also list all remote windows, processes, and loaded modules running on the server. Its convenient interface is a little like Windows Explorer. One...
- Tags: Client, RemoteComputer, Data, Keyboards, Servers, Hardware, Peripherals
- Software downloads 2005-10-11
- Frame Relay: All You Want to Know
- Frame Relay is a high performance WAN encapsulation method that has become one of the most popular technologies in use. Frame Relay puts data in a variable size unit called a frame and leaves any necessary error correction up to the end-points. This provides for a high speed, low overhead,...
- Tags: Frame Relay, Network Technology, Networking
- White papers
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