http://www.mynetworkdictionary.com Resources for Networkers Thu, 01 Jul 2010 05:21:16 +0000 http://backend.userland.com/rss092 en Today I needed to get interested in how memory works at the IOS, so here is a quick article about it with the information I could find here and there, you might be interested.Especially the IOS commands to check the memory status of your router. Like any OS, IOS must implement ... http://www.mynetworkdictionary.com/2010/06/ios-and-memory-management/ Authentication Here's how to configure authentication keys for each router participating in the EIGRP routing process: R1 # conf t R1(config)# key chain EIGRP-KEYS R1(config-keychain)# key 1 R1 (config-keychain-key) # key-string cisco A2 # conf t R2 (config) # key chain EIGRP-KEYS R2 (config-keychain) key # 1 R2 (config-keychain-key) # key-string cisco Key verification R1 # show key ... http://www.mynetworkdictionary.com/2010/06/eigrp-with-the-authentication-and-timers/ The configuration and management of a Cisco PIX have logic similar to that of the IOS on the router and the same commands tend, with new releases to look alike. Especially with the release 6.x, were introduced to the IOS commands common but has been maintained compatibility with older equivalent. As ... http://www.mynetworkdictionary.com/2010/06/cisco-pix-basic-command/ Frame Relay operates at the Layer 2 technology and is an NBMA(Non Broadcast Multiple Access). DTE and DCE Router DTE, DCE is the FR-switch at the provider. Local Management Interface LMI runs between DTE and DCE Allocation of the DLCI DTE possible Keepalives LMI types: Cisco, ANSI, Q933a Auto Sensing from IOS 11.2 Topologies Hub and spoke Full mesh [requires n ... http://www.mynetworkdictionary.com/2010/06/839/ With the Address Resolution Protocol (ARP) can determine IP hosts MAC address to an IP address. This mapping is stored in the ARP cache. An attacker can try using falsified ARP frames to manipulate these Zuordnugn. He may be either a man-the-middle attack in conduct or communication in the network ... http://www.mynetworkdictionary.com/2010/06/dynamic-arp-inspection-dai-cisco-switch-for-safe/ Security was one of the first features for securing network ports. Access to the network via this address controlled. The MAC can access port to specific MAC addresses or a number of addresses to be limited. In violation of a defined traffic rules can be filtered (violation protect or restrict) or ... http://www.mynetworkdictionary.com/2010/06/port-security-setting-cisco-switch-safely/ Definition of service quality The term QoS (an acronym for "Quality of Service") means the ability to provide service (such as a communication medium) which meets requirements of response time and bandwidth. Applied to packet switching networks (based networks using routers) for QoS is the ability to be able to guarantee an ... http://www.mynetworkdictionary.com/2010/06/qos-quality-of-service/ Introduction to Netstat Netstat is a tool to determine the TCP connections are active on the machine where the command is enabled and thus list all the ports TCP and UDP open on the computer. The command "netstat" also provides statistics on a number of protocols (Ethernet, IPv4, TCP, UDP, ICMP ... http://www.mynetworkdictionary.com/2010/06/netstat-tool/ "Ping" (short for Packet Internet Groper) is without doubt one of the tools of network administration best known. Yet this is one of the most simple since it allows, through the sending packets to verify if a remote machine responds and, by extension, it is accessible via the network. The ping ... http://www.mynetworkdictionary.com/2010/06/the-ping-tool/ Introduction to Traceroute Traceroute is a tool for diagnosing networks, present on most operating systems, to determine the path followed by a package. The traceroute command allows to draw a map of the routers between a source machine and target machine. The traceroute command differs between operating systems. Under the systems UNIX ... http://www.mynetworkdictionary.com/2010/06/traceroute-tool/