Cisco VPN error 412 occasionally occurs when using the Cisco VPN client. The exact error message may differ between versions of the Cisco VPN client, but will be similar to this: Error Secure VPN Connection terminated locally by the Client. Reason 412: The remote peer is no longer responding. Causes for Cisco VPN Error 412 There are many error 412 causes, including: Poor network connection. Packet delay or loss can force the VPN session to drop. Hardware failure in a network interface card or network device. A firewall or ACL Read More

Cisco IOS software is installed in the manageable Cisco switches for better LAN management. It delivers network services and enabled networked applications. The Cisco IOS has a command line interface that helps users to execute the Cisco IOS commands. Cisco Switch Commands The Cisco switch IOS has different EXEC modes with distinctive prompts. These modes execute different Cisco switch commands. Each mode has a set of specific commands. The fundamentals of the Cisco IOS User Interface are as follows : Uses a command line interface Operations vary on different series Read More

Linksys is a leading producer of networking devices, including wireless routers, modems, and network storage devices. Millions of people worldwide use Linksys products for both residential and commercial purposes. Linksys Default Password Linksys routers have a built-in control panel that allows you to change configuration settings, set the router to work with other devices, and set up network security. You can access this control panel by entering 192.168.1.1 into the address bar of any web browser. You will then be prompted for your username and password (this information is printed Read More

Coaxial cables are necessary for rooftop antennas and dish antennas in order to provide crystal-clear sound and audio input. RG-11 bands typically have 75-ohm wires made of copper. Polyethylene dielectric makes sure that there is minimal loss of picture and sound while the antenna receives audio or video feeds. Most users of the RG-11 have reported high-quality resolution of the images transferred by these cables. RG-11 Specifications Type RG-11 RG-11A Impedance Z0(Ω) 75 75 Dielectric Solid Polyethylene Solid Polyethylene Time Delay (ns/ft) 1.54 1.54 Propagation Velocity (% of c) 65.9 Read More

EIA/TIA 568B is a standard for the pin arrangements of RJ-45 connectors on Unshielded Twisted Pair (UTP) wire. The 568B standard was developed by AT&T under the name 258A. 568B Color Codes Pin (Jack) Pin (Plug) Color Pair 1 8 White/Orange 2 – Tip 2 7 Orange 2 – Ring 3 6 White/Green 3 – Tip 4 5 Blue 1 – Ring 5 4 White/Blue 1 – Tip 6 3 Green 3 – Ring 7 2 White Brown 4 – Tip 8 1 Brown 4 – Ring Pin numbers are Read More

ARP (Address Resolution Protocol) is used by network systems to convert system communications from the routable layer 3 ip protocol to the non-routable layer 2 data link layer protocols. In most cases, you don't need to modify this behavior at all, and system communications are optimal. In special circumstances it is preferable to have another system or network device answer arp requests for another system. This process is called proxy arp, because on network system is proxying for anothers ARP communications. Environments that use proxy arp There are few situations Read More

The Subscriber Connector (SC) is a fiber optic connector with a push-pull latching mechanism that provides quick insertion and removal while ensuring a positive connection. The SC is also available in a duplex configuration. It has a benefit in keyed duplex capability to support send/receive channels. This connector is commonly used for most modern network applications. The SC is a snap-in connector that is extensively used in single-mode systems for its remarkable efficiency. Subscriber Connectors are inexpensive, trouble-free, and robust. They give precise positioning via their ceramic ferrules. The square Read More

A VPN (Virtual Private Network) server is one that is connected to a Virtual Private Network in order to allow remote users to access files on the server. Companies, government agencies, and various institutions use VPN servers in order to provide users who are away from the server with consistent access to important files and software. Likewise, VPN servers are used domestically to ensure that users have access to computer files while they are away from their home or office. How VPN Servers Work A VPN server is simply one Read More

VoIP QoS (Voice over Internet Protocol Quality of Service) is used in VoIP services to determine a VoIP network’s overall performance and make changes to increase the customer satisfaction rate. QoS is used in other systems (like computer networks) as well, but is especially important in VoIP services because of the high demand for prompt, real-time voice packet delivery and call handling. VoIP QoS generally refers to the VoIP system’s bit rate, delay, and bit error rate and provides customers with a realistic idea of the VoIP network’s capabilities. How Read More

802.11g is one of the standards used for high speed wireless networks, commonly known as Wifi. This standard was created by the IEEE (Institute of Electrical and Electronics Engineers) in June of 2003 and uses a 2.4 to 2.5 gigahertz radio frequency to send and receive data from one device to another. There are several standards that are in use today for wireless communication, others include 802.11a, 802.11b and 802.11n. The standard 802.11g is becoming quite popular during the last several years for its speed, quality of transmission and competitive Read More