Definition of Cisco
Defined as: A well-known manufacturer of networking equipment, such as routers, bridges, frame and ATM switches, dial-up access servers, and network management software.
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Cisco
CBAC - Cisco IOS Firewall Feature Set foundations
With the commercial firewall market dominated by expensive firewall products such as those from Checkpoint, Nokia and Cisco (PIX Firewall), many smaller organizations rely on packet filtering technologies and Access-Control Lists (ACLs) on perimeter routers to provide basic firewall features or perimeter defenses. Since IOS 11.2(P), Cisco has enhanced the ability of its perimeter routers to perform a basic firewall function with the introduction of the Cisco IOS Firewall feature set. Although not suitable for all situations the Firewall feature set is a substantial improvement over ACL based filters.
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The VLAN.DAT File
CCNA and CCNP candidates who have their own Cisco home labs often email me about an odd situation that occurs when they erase a switch's configuration. Their startup configuration is gone, as they expect, but the VLAN and VTP information is still there!
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How And Why To Build an Etherchannel
CCNA and CCNP candidates are well-versed in Spanning-Tree Protocol, and one of the great things about STP is that it works well with little or no additional configuration. There is one situation where STP works against us just a bit while it prevents switching loops, and that is the situation where two switches have multiple physical connections.
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