Nutter helps a reader with a new Catalyst switch and a handful of Macs I just converted my company over to a Cisco Catalyst 6509 core switch. Several weeks after the fact I found out that there are a ...

Many administrators forget—or don't even realize—that they can configure Dynamic Host Configuration Protocol (DHCP) on Cisco IOS routers and switches. David Davis discusses the pros and cons of this ...

Two of the most common forms of network address translation (NAT) are dynamic port address translation (PAT) and static NAT. PAT is the many-to-one form of NAT implemented in many small office and ...

Most IT pros realize that using Telnet to manage routers, switches, and firewalls is insecure. Transmitted in clear text across a network, Telnet traffic basically publicizes any login usernames and ...