Do not be alarmed, but a bright storm system three quarters the width of our entire planet has emerged over Neptunes equator, in a region where no bright clouds. A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. Search Flickr Better With Google Images. At a for profit editorial outlet like Lifehacker, when we need an image for our posts, we cant just do a Google image search and slap up the first result. We have to use properly licensed photos. Sometimes we use our own original photos, sometimes Getty images that we pay for, sometimes the millions of Flickr photos licensed for free use through Creative Commons. But since 2. 01. 4, Google Images has also let users filter photos by license. And unlike Flickr, Google Images uses the most sophisticated search algorithms on the planet. So it can unearth some Flickr photos that even Flickr cant. For a recent post, I needed a hero shot of hand towels. Searching hand towels on Flickr returned a lot of hands near and around towels, plus the usual Second Life screenshots and NSFW art. Flickr just knew I wanted content about hands and towels. But Google guessed that my phrasing mattered, and found more actual hand towels, like the beautiful red and yellow number in my post. Flickr knew that was a picture of a towel, but it couldnt recognize the hand part, since that word appeared nowhere on the images main page. Googles AI algorithms may have literally recognized this was a hand towel, or maybe Google just knew that other sites had linked or embedded the image with the relevant phrase. Either way, it dug up an image that hadnt been explicitly labeled, but was exactly what I needed. So for any tricky image searches, you still might want to dig into Googles Tools menu before trying a specialized engine. Google Images will filter images by size, color, recency, license, or even pick out photos, faces, line drawings, animations, or clip art. If youre searching by license, youll still need to click through from the Google result to the images original page, to confirm the license and follow any restrictions, like giving attribution. Googles powerful, but its not perfect, and you cant blame it when someone comes at you for using their photo without following the rules. Router computing Wikipedia. A Cisco ASM2 3. EM router deployed at CERN in 1. A routera is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to another router through the networks that constitute an internetwork until it reaches its destination node. A router is connected to two or more data lines from different networks. When a data packet comes in on one of the lines, the router reads the network address information in the packet to determine the ultimate destination. Uploads/F3.JPG' alt='Cloud System Booster Serial Protocols' title='Cloud System Booster Serial Protocols' />Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey. The most familiar type of routers are home and small office routers that simply pass IP packets between the home computers and the Internet. An example of a router would be the owners cable or DSL router, which connects to the Internet through an Internet service provider ISP. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, software based routers also exist. Applicationsedit. A typical home or small office DSL router showing the RJ1. ADSL, and Ethernet RJ4. A router may have interfaces for different types physical layer connections, such as copper cables, fiber optic, or wireless transmission. Its firmware can also support different network layer transmission standards. Each network interface is used by this specialized computer software to enable data packets to be forwarded from one transmission system to another. Routers may also be used to connect two or more logical groups of computer devices known as subnets, each with a different network prefix. The network prefixes recorded in the routing table do not necessarily map directly to the physical interface connections. When multiple routers are used in interconnected networks, the routers can exchange information about destination addresses using a routing protocol. Each router builds up a routing table listing the preferred routes between any two systems on the interconnected networks. A router has two types of network element components organized onto separate planes 5Control plane A router maintains a routing table that lists which route should be used to forward a data packet, and through which physical interface connection. It does this using internal preconfigured directives, called static routes, or by learning routes dynamically using a routing protocol. Static and dynamic routes are stored in the routing table. The control plane logic then strips non essential directives from the table and builds a forwarding information base FIB to be used by the forwarding plane. Forwarding plane The router forwards data packets between incoming and outgoing interface connections. It forwards them to the correct network type using information that the packet header contains matched to entries in the FIB supplied by the control plane. Routers may provide connectivity within enterprises, between enterprises and the Internet, or between internet service providers ISPs networks. The largest routers such as the Cisco CRS 1 or Juniper PTX interconnect the various ISPs, or may be used in large enterprise networks. Smaller routers usually provide connectivity for typical home and office networks. All sizes of routers may be found inside enterprises. The most powerful routers are usually found in ISPs, academic and research facilities. Large businesses may also need more powerful routers to cope with ever increasing demands of intranet data traffic. A three layer model is in common use, not all of which need be present in smaller networks. Access routers, including small officehome office SOHO models, are located at customer sites such as branch offices that do not need hierarchical routing of their own. Typically, they are optimized for low cost. Neo Sans Pro Opentype. Some SOHO routers are capable of running alternative free Linux based firmware like Tomato, Open. Wrt or DD WRT. 9DistributioneditDistribution routers aggregate traffic from multiple access routers, either at the same site, or to collect the data streams from multiple sites to a major enterprise location. Distribution routers are often responsible for enforcing quality of service across a wide area network WAN, so they may have considerable memory installed, multiple WAN interface connections, and substantial onboard data processing routines. They may also provide connectivity to groups of file servers or other external networks. SecurityeditExternal networks must be carefully considered as part of the overall security strategy of the local network. A router may include a firewall, VPN handling, and other security functions, or these may be handled by separate devices. Many companies produced security oriented routers, including Cisco PIX series, Cisco Meraki MX series and Juniper Net. Screen. Routers also commonly perform network address translation, which allows multiple devices on a network to share a single public IP address1. Some experts argue that open source routers are more secure and reliable than closed source routers because open source routers allow mistakes to be quickly found and corrected. In enterprises, a core router may provide a collapsed backbone interconnecting the distribution tier routers from multiple buildings of a campus, or large enterprise locations. They tend to be optimized for high bandwidth, but lack some of the features of edge routers. Internet connectivity and internal useeditRouters intended for ISP and major enterprise connectivity usually exchange routing information using the Border Gateway Protocol BGP. RFC 4. 09. 8 standard defines the types of BGP routers according to their functions 1. Edge router Also called a provider edge router, is placed at the edge of an ISP network. The router uses External BGP to EBGP routers in other ISPs, or a large enterprise Autonomous System. Subscriber edge router Also called a Customer Edge router, is located at the edge of the subscribers network, it also uses EBGP to its providers Autonomous System. It is typically used in an enterprise organization. Inter provider border router Interconnecting ISPs, is a BGP router that maintains BGP sessions with other BGP routers in ISP Autonomous Systems. Core router A core router resides within an Autonomous System as a back bone to carry traffic between edge routers. Within an ISP In the ISPs Autonomous System, a router uses internal BGP to communicate with other ISP edge routers, other intranet core routers, or the ISPs intranet provider border routers. Internet backbone The Internet no longer has a clearly identifiable backbone, unlike its predecessor networks. See default free zone DFZ. The major ISPs system routers make up what could be considered to be the current Internet backbone core. ISPs operate all four types of the BGP routers described here. An ISP core router is used to interconnect its edge and border routers. Core routers may also have specialized functions in virtual private networks based on a combination of BGP and Multi Protocol Label Switching protocols. Port forwarding Routers are also used for port forwarding between private Internet connected servers. VoiceDataFaxVideo Processing Routers Commonly referred to as access servers or gateways, these devices are used to route and process voice, data, video and fax traffic on the Internet. Since 2. 00. 5, most long distance phone calls have been processed as IP traffic VOIP through a voice gateway. Use of access server type routers expanded with the advent of the Internet, first with dial up access and another resurgence with voice phone service.