computer science

List of 3Com products

List of 3Com products is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand List of 3Com products rather than just read about it. In short: On 12 April 2010, Hewlett-Packard completed a previously announced acquisition of 3Com. Following the HP acquisition, 3Com was fully absorbed by HP and no longer exists as a separate entity.

Key takeaways

List of 3Com products belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect List of 3Com products to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of List of 3Com products from memory before moving on to harder problems.

Reference excerpt

On 12 April 2010, Hewlett-Packard completed a previously announced acquisition of 3Com. Following the HP acquisition, 3Com was fully absorbed by HP and no longer exists as a separate entity. The article below explains the portfolio at the time of acquisition. The corporation had three global brands: H3C, 3Com, and TippingPoint. Products sold under the 3Com brand include network switches, wireless access points, WAN routers, and IP voice systems.

Switches

Modular switches Switch 8800 - 7-, 10- and 14-slot configurations with optional dual load-sharing fabric modules. Of total slots, two reserved for fabrics. Backplane capacity 1.44 Terabit-per-second. Up to 48 10 Gigabit ports or 576 Gigabit ports, with optional PoE. Switch 7900E - 4-, 5-, 8-, and 12-slot configurations with optional dual fabric modules. One model with 8 vertical slots. Of total slots, two reserved for fabrics. Backplane capacity 2.88 Terabit-per-second. Up to 24 10GE ports or 480 Gigabit ports, with optional PoE. Switch 7550 - 4-, 7- and 8-slot configurations. 4- and 7- have a single fabric module, while 8-slot can have dual redundant fabric modules. Up to 292 Gigabit ports.

Fully managed fixed switches These switches support comprehensive Command Line Interface, Telnet, web interface, SNMP management, and interoperable single IP management clustering (basic stacking). Warranty for these is 3Com Limited Lifetime (up to five years after product is discontinued) with Next Business Day Advanced Hardware Replacement. Covers unit, power supply and fan. 90-day phone support. Lifetime access to software updates.

Switch 5500G - Gigabit. Stackable, 24 or 48 Gb ports including 4 Dual Personality Ports (2 × Gb or SFPs). Additionally includes two dedicated 24 Gbit/s stacking ports and one module expansion slot. Available modules: 2-Port 10GE XFP; 1-Port 10GE XENPAK; 8-Port Gb SFP. Layer 2 switching and Layer 3 static routing, RIP, and multicast routing (OSPF, PIM). Stackable up to 8-units high using 3Com XRN Technology, with distributed link aggregation, resilient stacking up to 96 Gbit/s bandwidth, distributed routing tables, single IP address management. Two PoE models and upgradeable PoE. Single IP management clustering (basic stacking) also supported. Switch 4800G - Gigabit. Stackable, 24 or 48 Gb ports including 4 Dual Personality Ports (2 × Gb or SFPs). Additionally includes two module expansion slots. Available modules: 2-Port 10GE XFP; 1-Port 10GE XFP; 2-Port Local Connection; 2-Port Gb SFP. Two PoE models. Layer 2 switching and Layer 3 static routing, RIP, and multicast routing (OSPF, PIM). Stackable up to 9-units high using 3Com XRN Technology, with distributed link aggregation, resilient stacking up to 96 Gbit/s bandwidth, single IP address management. Single IP management clustering (basic stacking) also supported. Switch 4500G - Gigabit. 24 or 48 Gb ports including 4 Dual Personality Ports (2 × Gb or SFPs). Additionally includes two module expansion slots. Available modules: 2-Port 10GE XFP; 1-Port 10GE XFP; 2-Port Local Connection. Two PoE models. Supports Layer 2 switching and Layer 3 static routing, RIP. Single IP management clustering basic stacking supported. Switch 4200G - Gigabit. 12, 24 or 48 Gb ports including 4 Dual Personality Ports (2 × Gb or SFPs). 12-Port module has one 10-Gigabit expansion slot; other units have two 10-Gigabit expansion slots. One PoE model. Units can directly take a 10GE XENPAK, or can receive a 1-Port 10GE XFP module. Supports Layer 2 switching and Layer 3 static routing. Single IP management clustering basic stacking supported. Switch 5500 - Fast Ethernet. 28- and 52-port models. Two PoE models. Stackable, 24 or 48 10/100 ports plus four SFP Gigabit Ports. One model 24 100 Mb SFPs plus 2 × Gb and 2 × SFP Gigabit Ports. Supports Layer 2 switching and Layer 3 static routing, RIP, and multicast routing (OSPF, PIM). Stackable up to 8-units high using Gb ports and 3Com XRN Technology, with distributed link aggregation, resilient stacking, distributed routing tables, single IP address management. Single IP management clustering (basic stacking) also supported. Switch 4500 - Fast Ethernet. 26- and 50-port models. Two PoE models. Stackable, 24 or 48 10/100 ports plus 4 Dual Personality Ports (2 × Gb or SFPs). Supports Layer 2 switching and Layer 3 static routing, and RIP. Stackable up to 8-units high using Gigabit ports with distributed link aggregation, single IP address management. Single IP management clustering (basic stacking) also supported. Switch 4210 - Fast Ethernet. 9-, 18-, 26-, and 52-port models. Three PoE models. 10/100 ports plus one (9-port model) or two (all others) Dual Personality Ports (Gb or SFPs). Supports Layer 2 switching only. Single IP management clustering basic stacking supported.

Web managed switches These "smart managed" switches support a web interface for changing unit configuration. They have a limited Command Line Interface and do not support remote access via Telnet. Warranty for these is 3Com Limited Lifetime (up to five years after product is discontinued) with Next Business Day Advanced Hardware Replacement. Covers unit, power supply and fan. 90 day phone support. Lifetime access to software updates.

Baseline Plus 2900 - Gigabit. 16, 24 or 48 Gb ports including 4 Dual Personality Ports (2 x Gb or SFPs). One PoE model. Supports Layer 2 switching only. Baseline Plus 2200/2400 - Fast Ethernet. 26- and 50-port models. One PoE model. Supports Layer 2 switching only.

Unmanaged switches These switches are plug-and-play with no interface for modifying or adjusting the configuration.

Baseline 2800 - Gigabit. 16 or 24 Gb ports. Supports Layer 2 switching only. Baseline 2000/2100 - Fast Ethernet. 16-, 24- and 26-port models. The 26-port model has two Gb ports. Supports Layer 2 switching only.

Discontinued products Switch 4400 - Fast Ethernet Switch 4200 - Fast Ethernet Switch 3870 - Gigabit Ethernet Switch 3800 - Gigabit Ethernet Switch 3300 - Fast Ethernet Ergo - 3Com Audrey

References

External links 3Com Corporation Website

Illustrations

Worked examples

Example 1 — a first encounter with List of 3Com products

Start with the simplest possible case. Write down what List of 3Com products claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to List of 3Com products before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about List of 3Com products ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of List of 3Com products

In research: List of 3Com products appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses List of 3Com products in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: List of 3Com products is common in secondary-school and first-year university syllabi. It links to neighbouring topics Lists of computer hardware, so understanding it makes those chapters shorter.
In everyday life: Look for List of 3Com products outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study List of 3Com products in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what List of 3Com products means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain List of 3Com products out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is List of 3Com products in simple terms?

On 12 April 2010, Hewlett-Packard completed a previously announced acquisition of 3Com. Following the HP acquisition, 3Com was fully absorbed by HP and no longer exists as a separate entity.

Why does List of 3Com products matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study List of 3Com products?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on List of 3Com products.