DRBD verwijst naar block toestellen die zijn ontworpen als een bouwsteen voor een hoge beschikbaarheid (HA) clusters te vormen. Dit wordt gedaan door spiegelen een hele block device via een toegewezen netwerk. DRBD kan worden opgevat als netwerk gebaseerd raid-1. In de bovenstaande afbeelding, de twee oranje vakjes vertegenwoordigen twee servers die een HA-cluster te [...]

An Overview of Wiring Requirements to Support Residential DSL Service Digital Subscriber Line (DSL) refers to a set of technologies used to provide broadband services via the existing copper cable plant. One variation of DSL is Asymmetric Digital Subscriber Line or ADSL, which has become very popular for residential internet access. ADSL can provide a [...]

http://tldp.org/HOWTO/Adv-Routing-HOWTO/ Exploring your current configuration This may come as a surprise, but iproute2 is already configured! The current commands ifconfig and route are already using the advanced syscalls, but mostly with very default (ie. boring) settings. The ip tool is central, and we’ll ask it to display our interfaces for us. 3.4.1. ip shows us [...]

iperf is a tool for performing network throughput measurements. It can test either TCP or UDP throughput. To perform an iperf test the user must establish both a server (to discard traffic) and a client (to generate traffic). ======================================= Server side: ./iperf -s Client connecting to 192.168.202.62, TCP port 5001 TCP window size: 16.0 KByte [...]

In this tutorual will go over the most useful netcat commands. Netcat is a tool that every IT professional should have in their tool box, if you’re responsible for network or systems security, it is essential that you understand the capabilities of netcat. The original version of netcat is a UNIX program. Its author is [...]

Many new workstations and servers are coming with integrated gigabit (define) network cards, but quite a few people soon discover that they can’t transfer data much faster than they did with 100 Mb/s network cards. Multiple factors can affect your ability to transfer at higher speeds, and most of them revolve around operating system settings. [...]

Uit Wikipedia, de vrije encyclopedie Ga naar: navigatie, zoeken RJ-45 connectors Een RJ-45 connector (RJ = Registered Jack, geregistreerde insteekplug) is een 8-polige modulaire connector die vooral gebruikt wordt voor twisted pair ethernetverbindingen en ISDN-telefonie, maar ook voor RS-232. Afhankelijk van de toepassing is een andere benaming 8P8C (8 positions/posities, 8 conductors/geleiders), 8P6C of 8P4C [...]

Internet protocols and network Application Layer DNS FTP Gopher HTTP HTTPS IMAP IRC NNTP, POP3 RTP SIP SMTP SNMP SSH Telnet UUCP SSL XMPP Transport layer TCP UDP DCCP SCTP Network Layer ARP RARP ICMP, IGMP, IPv4 IPv6 Data Link Layer PPP Token Ring FDDI ATM Ethernet Wi-Fi according to the TCP / IP model [...]

1000BASE-T capable PCI-X network interface card from Intel 1000BASE-T (also known as IEEE 802.3ab) is a standard for gigabit Ethernet over copper wiring. Each 1000BASE-T network segment can be a maximum length of 100 meters (328 feet), and must utilize “Category 5″ cabling at a minimum. Category 5e cable or Category 6 cable may also [...]

By Aaron Weiss November 8, 2005 The story of the Linksys Wireless-G Router (model WRT54G) and how you can turn a $60 router into a $600 router is a little bit CSI and a little bit Freaks & Geeks. It’s also the story of how the open source movement can produce a win-win scenario for [...]