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Packet Tracer is commonly used by NetAcad students, since it is available to download after creating a free account. [10] However, due to functional limitations, it is intended by Cisco to be used only as a learning aid, not a replacement for Cisco routers and switches . [ 9 ]
Often the route a packet needs to take through a network is not immediately available. In that case, the packet is queued and waits until a link is free. The physical link technologies of packet networks typically limit the size of packets to a certain maximum transmission unit (MTU). A longer message may be fragmented before it is transferred ...
The Cisco Nexus series switches are modular and fixed port network switches designed for the data center. Cisco Systems introduced the Nexus Series of switches on January 28, 2008. The first chassis in the Nexus 7000 family is a 10-slot chassis with two supervisor engine slots and eight I/O module slots at the front, as well as five crossbar ...
In digital communications networks, packet processing refers to the wide variety of algorithms that are applied to a packet of data or information as it moves through the various network elements of a communications network. With the increased performance of network interfaces, there is a corresponding need for faster packet processing.
Cisco IOS XR Line card running IOS XR. IOS XR is a release train of Cisco Systems ' widely deployed Internetwork Operating System (IOS) , used on their high-end Network Convergence System (NCS) and carrier-grade routers such as the ASR 9000 series and Carrier Routing System series of routers.
The current use of the IPv6 Traffic Class field divides this between a 6 bit Differentiated Services Code Point [34] and a 2-bit Explicit Congestion Notification field. [ 35 ] Extension headers carry options that are used for special treatment of a packet in the network, e.g., for routing, fragmentation, and for security using the IPsec framework.
[64] A non-uniform frame size configuration in the network using jumbo frames may be detected as jabber by end nodes. [citation needed] Jumbo frames are not part of the official IEEE 802.3 Ethernet standard. A packet detected as jabber by an upstream repeater and subsequently cut off has an invalid frame check sequence and is dropped. [65]
A 64-bit interface identifier can be derived from the interface's 48-bit MAC address, although stable privacy addresses are now recommended as a default instead. [2] A MAC address 00-0C-29-0C-47-D5 is turned into a 64-bit EUI-64 by inserting FF-FE in the middle: 00-0C-29- FF-FE -0C-47-D5 .