Home > May, 2008

What is Proxy ARP?

Archived in the category: Network Layer
Posted by zyreel on 31 May 08 - 1 Comment

Proxy ARP is a technique for using the ARP protocol to provide an ad hoc routing mechanism.
A multi-port networking device (e.g. a router) implementing Proxy ARP will respond to ARP requests on one interface as being responsible for addresses of device addresses on another interface. The device can then receive and forward packets addressed to [...]

What is ARP Mediation?

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

ARP Mediation refers to the process of resolving Layer 2 addresses when different resolution protocols are used on either circuit, e.g. ATM on one end and Ethernet on the other.

What is IPv6 packet?

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

The IPv6 packet is composed of two main parts: the header and the payload.
The header is in the first 40 bytes (320 bits) of the packet and contains both source and destination addresses (128 bits each), as well as the version (4-bit IP version), traffic class (8 bits, Packet Priority), flow label (20 bits, QoS [...]

What is Comparison between ARP and InARP?

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

ARP translates Layer 3 addresses to Layer 2 addresses, therefore InARP can be viewed as its inverse. In addition, InARP is actually implemented as an extension to ARP. The packet formats are the same, only the operation code and the filled fields differ.
Reverse ARP (RARP), like InARP, also translates Layer 2 addresses to Layer 3 [...]

What is OSPF?

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

The Open Shortest Path First (OSPF) protocol is a hierarchical interior gateway protocol (IGP) for routing in Internet Protocol, using a link-state in the individual areas that make up the hierarchy. A computation based on Dijkstra’s algorithm is used to calculate the shortest path tree inside each area. The current version, Version 3, defined in [...]

What is ARP?

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

In computer networking, the Address Resolution Protocol (ARP) is the standard method for finding a host’s hardware address when only its network layer address is known.
ARP is not an IP-only or Ethernet-only protocol; it can be used to resolve many different network-layer protocol addresses to hardware addresses, although, due to the overwhelming prevalence of IPv4 [...]

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 [...]