Network infrastructure
Network hardware and physical appliances, such as routers, switches, gateways, hubs and bridges, serve as the vital foundation of network infrastructure. Common network protocols and more emergent network software also play major roles in any architecture. While networking has shifted to software-centric principles, see how traditional network infrastructure keeps pace.
Top Stories
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Tip
07 Jan 2025
The role of container networking in DevOps
Containerization isn't just for DevOps teams. Network engineers often set up container networks, ensure connectivity between containers and work with container networking tools. Continue Reading
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Tip
30 Dec 2024
How to use network automation to ease cloud integration
Cloud network automation can ease the integration of networking and cloud resources. Set clear objectives and standardize tools to make the process smoother. Continue Reading
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- Answer 11 Jul 2005
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Tip
27 Jun 2005
Wireless LAN deployment and federal regulations
A look at the bare minimum requirements to keep your WLAN compliant with federal regulations. Continue Reading
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Feature
22 Jun 2005
Router and firewall configuration
ITKnowledge Exchange member "stephang" had a question about the balance between blocking packets and enabling NAT on his router and on his firewall. Fellow forum members chipped in with their advice; check out what they had to say. Continue Reading
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Tip
16 Jun 2005
Secure WLAN best practices and topology
Expert Michael Martin provides a list of wireless security "dos and don'ts" and a sample topology for a secure WLAN. Continue Reading
- Answer 31 May 2005
- Answer 06 May 2005
- Answer 19 Apr 2005
- Answer 28 Mar 2005
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Tip
18 Mar 2005
Router Expert: Filtering with MAC addresses
This month our router expert discuss some strategies for controlling host network access using MAC address filtering. Continue Reading
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Tip
17 Mar 2005
Focus Windows port scanning with the netscan command
How to use the netscan command to focus Windows port scanning. Continue Reading
- Answer 17 Mar 2005
- Answer 24 Feb 2005
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- Answer 15 Feb 2005
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Answer
19 Jan 2005
What are the advantages of 10 Gigabit Ethernet?
Learn about the advantages of using 10 Gigabit Ethernet for your corporate network, in this Ask the Expert response. Continue Reading
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Answer
11 Jan 2005
Can you assign an IP address ending in .0 or .255?
Learn how to assign an IP address ending in .0 or .255 from networking fundamentals expert Chris Partsenidis in this Q&A. Continue Reading
- Answer 11 Jan 2005
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Tip
03 Jan 2005
Minimizing Layer 2 problems
Understanding the fundamentals of Spanning Tree Protocol. Continue Reading
- Tip 16 Dec 2004
- Answer 22 Nov 2004
- Answer 09 Nov 2004
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Tutorial
14 Oct 2004
Routing First-Step: Classless Internet addressing
Routing and Internet addressing are two important concepts involved in networking. Routing First-Step covers the basics of routing in clear, easy-to-understand language. Continue Reading
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Tutorial
13 Oct 2004
Protocols, Lesson 6: IP subnetting - The basic concepts
Learn the basics of IP subnetting. Continue Reading
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Tip
12 Oct 2004
Protocols, Lesson 7: Subnet masks and their effect
Understand the different effects a subnet mask can have. Continue Reading
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Tip
10 Oct 2004
Protocols, Lesson 9: Subnet routing and communications
Lesson 9 in our protocol series covers the communications side of subnetting. Continue Reading
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Tutorial
07 Oct 2004
Routing First-Step: IP header format
Routing and Internet addressing are two important concepts involved in networking. Routing First-Step covers the basics of routing in clear, easy-to-understand language. Continue Reading
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Answer
27 Sep 2004
Connecting two hosts with the same IP address but different subnet masks
Is it possible to communicate two hosts with the same IP address but different subnet mask without adding a router? Continue Reading
- Answer 27 Sep 2004
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Answer
09 Aug 2004
Can you please explain how a DHCP server allocates IP addresses dynamically?
Learn how DHCP works in this Ask the Expert response from our networking fundamentals expert, Chris Partsenidis. Continue Reading
- Tip 06 Aug 2004
- Answer 04 Aug 2004
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Tip
28 Jul 2004
Top 10 things to know about network administration
A list of the most important things network administrators should know. Continue Reading
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Tip
26 Jul 2004
Router Expert: Understanding reverse telnet and IOS terminal lines
Learn how users interact with the terminal server and its connected devices through the use of reverse telnet, line and group rotaries, and terminal line interfaces. Continue Reading
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Tutorial
26 Jul 2004
Five critical planning steps for wireless LANs, Step 5: Manageability -- Switching to WLAN switches
This article explains how WLAN switches will help to alleviate manageability issues. Continue Reading
- Answer 20 Jul 2004
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Tip
09 Jul 2004
Deploying both a private and public WLAN
Lisa Phifer answers a reader's request for information about planning and deploying a wireless LAN -- one private and one public. Continue Reading
- Answer 06 Jul 2004
- Answer 30 Jun 2004
- Answer 25 Jun 2004
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Tip
23 May 2004
Router Expert: Implementing router interface redundancy
While redundancy is simple as a concept, it becomes quite problematic in practice. This tip offers the basic options for router interface redundancy. Continue Reading
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Tip
10 May 2004
OSPF configuration
Nuances of OSPF configuration could impact your network more than you expect. Continue Reading
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Tip
10 May 2004
Learning Guide: Voice over IP basics
This guide contains all the VoIP basics and essentials you will need when implementing an IP telephony network. Continue Reading
- Answer 30 Apr 2004
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Tip
23 Apr 2004
Router Expert: Cisco asynchronous serial support
Cisco IOS-based routers support three asynchronous serial interface types: Console, Auxiliary, and asynchronous port modules. This tip compares them. Continue Reading
- Answer 23 Apr 2004
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- Answer 23 Apr 2004
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Tutorial
19 Apr 2004
Networking hardware, Lesson 2: Switches and bridges
Explanation of how switches and bridges work. Continue Reading
- Answer 14 Apr 2004
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- Answer 24 Oct 2003
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- Answer 06 Oct 2003
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Tutorial
24 Sep 2003
LearnIT: Virtual LANs
What is a virtual LAN? This guide explains the basics in one easy to read format. Continue Reading
- Quiz 24 Sep 2003
- Answer 14 Aug 2003
- Answer 29 Jul 2003
- Answer 29 Jul 2003
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- Tip 11 Feb 2003
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- Tip 23 Oct 2002
- Answer 30 Aug 2002
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News
21 Aug 2002
Security is WLAN's strength and weakness
Security is the Achilles' heel of wireless local are networks, but also one of its best opportunities. Continue Reading
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Tip
08 Jun 2001
Wireless LAN requirements
Thinking of going wireless? Find out what you need to consider in planning for a wireless network. Continue Reading
- Answer 16 May 2001
- Tip 05 Sep 2000
