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Whati is IGMP?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

The Internet Group Management Protocol (IGMP) is a communications protocol used to manage the membership of Internet Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast routers to establish multicast group memberships. It is an integral part of the IP multicast specification, like ICMP for unicast connections. IGMP can be used for [...]

What is DHCP?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

Dynamic Host Configuration Protocol (DHCP) is a protocol used by networked computers (clients) to obtain IP addresses and other parameters such as the default gateway, subnet mask, and IP addresses of DNS servers from a DHCP server. The DHCP server ensures that all IP addresses are unique, e.g., no IP address is assigned to a [...]

What is Netware?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

A family of network operating systems from Novell that support Windows, Macintosh, DOS and OS/2 clients. Unix client support is available from third parties. In the early 1990s, NetWare was the largest installed base of LAN operating systems (see Novell).
Except for the earlier Personal NetWare and NetWare ELS peer-to-peer versions, NetWare is designed to run [...]

What is IPv6 scope?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

IPv6 defines 3 unicast address scopes: global, site, and link.
Site-local addresses are non-link-local addresses that are valid within the scope of an administratively-defined site and cannot be exported beyond it.
Site-local addresses are deprecated by RFC 3879. Note that this does not deprecate other site-scoped address types (e.g. site-scoped multicast).
Companion IPv6 specifications further define that only [...]

What is MOP?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

The Maintenance Operation Protocol (MOP) is used for utility services such as uploading and downloading system software, remote testing and problem diagnosis. It was a proprietary protocol of Digital Equipment Corporation. MOP frames can be one of the following commands:

[memory load data] Contains memory load data.
[mem load request] Request [...]

What Is IPX?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

(Internetwork Packet EXchange) The network layer protocol in the NetWare operating system. Similar to the IP layer in TCP/IP, it contains a network address and allows messages to be routed to a different network or subnet. IPX does not guarantee delivery of a complete message. Just like IP packets, NetWare IPX packets can get dropped [...]

What is Routing?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

Routing (or routeing) is the process of selecting paths in a network along which to send data or physical traffic. Routing is performed for many kinds of networks, including the telephone network, the Internet, and transport networks.
Routing directs forwarding, the passing of logically addressed packets from their source toward their ultimate destination through intermediary nodes; [...]

What is Tunneling?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

In order to reach the IPv6 Internet, an isolated host or network must be able to use the existing IPv4 infrastructure to carry IPv6 packets. This is done using a technique somewhat misleadingly known as tunneling which consists of encapsulating IPv6 packets within IPv4, in effect using IPv4 as a link layer for IPv6.
IPv6 packets [...]

What is Forwarding?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

Forwarding is the relaying of packets from one network segment to another by nodes in a computer network.
A unicast forwarding pattern, typical of many networking technologies including the overwhelming majority of Internet traffic
A multicast forwarding pattern, typical of PIM
A broadcast forwarding pattern, typical of bridged Ethernet
The simplest forwarding model - unicasting - involves a packet [...]

What is CLNS?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 0 Comments

CLNS is an abbreviation of Connectionless Network Service.
It is an OSI network layer service that does not require a circuit to be established before data is transmitted. CLNS routes messages to their destinations independently of any other messages.
In an OSI protocol deployment, CLNS would be the service provided by CLNP (Connectionless Network Protocol) and used [...]