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computer network or data network is a telecommunications network which allows computers to exchange data. In computer networks, networked computing devices exchange data with each other using a data link. The connections between nodes are established using either cable media or wireless media. The best-known computer network is the Internet.

Network computer devices that originate, route and terminate the data are called network nodes. Nodes can include hosts such as personal computers, phones, servers as well as networking hardware. Two such devices can be said to be networked together when one device is able to exchange information with the other device, whether or not they have a direct connection to each other.

Computer networks differ in the transmission medium used to carry their signals, the communications protocols to organize network traffic, the network’s size, topology and organizational intent.

Computer networks support an enormous number of applications such as access to the World Wide Web, video, digital audio, shared use of application and storage servers, printers, and fax machines, and use of email and instant messaging applications as well as many others. In most cases, application-specific communications protocols are layered (i.e. carried as payload) over other more general communications protocols.

VU#270232: Quagga bgpd with BGP peers enabled for VPNv4 contains a...

Quagga bgpd with BGP peers enabled for VPNv4 contains a buffer overflow vulnerability Original Release date: 10 Mar 2016 | Last revised: 10 Mar 2016 Overview Quagga,...

Cisco Lights a Fire in Its Security Business

VIDEO: Martin Roesch, VP and chief architect of Cisco's Security Business Group, discusses how things are going two years after his company Sourcefire was...

Encryption project issues 1 million free digital certificates in three months

Let's Encrypt, an organization set up to encourage broader use of encryption on the Web, has distributed 1 million free digital certificates in just...

NEDA Telecommunications Appoints SpeedCast to Build New Network for the Government...

SpeedCast to provide the Government of Afghanistan with secured and efficient connectivityDubai, United Arab Emirates, March 9, 2016 - SpeedCast International Limited (ASX: SDA),...

Will The Internet Of Things Enable Your Kettle To Steal Your...

Barry Mattacott, marketing director at security specialist Wick Hill Group, looks at the security risks of linking more and more smart devices to our...

Trivial path for DDoS amplification attacks found by infosec bods

600,000 servers are vulnerable to this little-known protocol Security researchers have discovered a new vector for DDoS amplification attacks – and it's quite literally trivial. Improperly...