Our take
HP's U.S. support record identifies the LaserJet 2100tn and maps it to product C4172A. The series guide separates the TN from the base 2100 and 2100M: the TN includes a JetDirect 600N print-server card with a 10Base-T RJ-45 port. HP documents manual two-sided printing for the series, but this is not an automatic-duplex configuration. The reviewed U.S. sources do not establish a recommended monthly range or a built-in Wi-Fi radio. Treat it as a specific legacy wired model, not a generic 2100 listing.
A legacy wired workflow that can use Ethernet and accepts manually refeeding paper for occasional two-sided jobs..
Avoid it if the office requires current wireless convenience, automatic duplex, a multifunction machine, or a documented monthly recommendation.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- HP maps the exact 2100tn identity to product C4172A in its U.S. support material.
- The TN guide identifies a standard JetDirect 600N with a 10Base-T Ethernet port.
- Manual duplex is documented for two-sided work when the user can refeed sheets.
What to weigh up
- Manual paper handling is required for duplex; automatic two-sided printing is not established.
- The 10Base-T connection and legacy software environment need compatibility checks.
- No recommended monthly range is stated in the reviewed exact-model packet.
The key details
| Model covered | 2100TN (C4172A) |
|---|---|
| Main functions | Print only |
| Print output | Monochrome laser; exact speed not established in the reviewed U.S. packet |
| Two-sided printing | 10Base-T Ethernet; manual two-sided printing |
Performance figures are manufacturer claims. Source checked October 11, 2026. Regional models and included accessories can differ.
What the features mean for you
Keep the TN suffix attached to the model
HP's support pages identify the LaserJet 2100tn and connect the product to C4172A. The 2100-series guide distinguishes TN from the 2100 and 2100M, including the network card and port arrangement. That difference matters because a broad 2100 name does not tell a buyer which interfaces are installed. Check the product label and rear connector before treating a unit as the TN version. These records establish intended configuration, not the condition, toner state, or included cable of a present listing.
A wired print server, not built-in Wi-Fi
HP describes a JetDirect 600N card with 10Base-T Ethernet for the 2100tn. That supports a wired connection to an older or deliberately isolated network, subject to the office's current switching and driver setup. The documented infrared feature is not Wi-Fi and should not be represented as wireless networking. Confirm that the RJ-45 port and card are present and that modern computers can send jobs through a supported print path. The model remains a print-only device; network access does not add scan or copy functions.
Manual duplex means a user handles the sheets
The series user guide describes manual duplexing. Users print one side, gather and reinsert the stack in the correct orientation, then print the reverse sides. This can be workable for occasional forms or short packets, but it adds time and creates opportunities for page-order errors during larger jobs. The TN should not be matched as automatic duplex simply because the guide explains a two-sided method. If frequent double-sided output is a hard requirement, compare an exact configuration with a documented automatic duplexer.
Rated output and monthly guidance remain separate
The reviewed exact U.S. packet does not provide a verified Letter speed or a recommended monthly range for the 2100tn, so those details remain unknown here. A model family name or a third-party sales title is not enough to fill either field. This limits workload comparisons with newer printers whose manufacturers publish clearer guidance. Estimate the actual office volume, then seek the original data sheet or service documentation if a rated threshold will determine the purchase. The print engine's age also makes unit condition more important than a nominal family figure.
Plan for an older device and software path
The HP records document the model's identity and connection card but do not confirm present driver compatibility, parts availability, or the state of a used machine. Ask for the model label, a printed sample, a network demonstration, page count if available, and service history. Verify the computer operating systems and any print-server dependencies before depending on it in a shared office. Do not infer current support from an archived guide. This model is a fit only when the wired legacy workflow is understood and its limits are acceptable.
What else to compare
The Xerox B310/DNI offers automatic duplex and built-in Wi-Fi alongside Ethernet; the 2100tn's distinction is its documented legacy JetDirect configuration.
Before you buy
Does the LaserJet 2100tn have Ethernet?
Yes. HP's TN guide documents a JetDirect 600N card with a 10Base-T Ethernet port.
Is Wi-Fi built into the 2100tn?
No built-in Wi-Fi is established in the reviewed HP documentation; infrared is a separate connection type.
Can it print on both sides automatically?
The reviewed guide documents manual duplexing, where users refeed the paper, not automatic duplex.
What is its recommended monthly volume?
The reviewed exact-model U.S. packet does not state a recommended monthly page range.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- HP U.S. LaserJet 2100tn support and product identity ↗ — checked October 11, 2026.
- HP U.S. LaserJet 2100tn exact-model support record ↗ — checked October 11, 2026.
- HP U.S. driver page mapping the LaserJet 2100tn to part C4172A ↗ — checked October 11, 2026.
- HP LaserJet 2100/2100M/2100TN guide for TN network card and manual duplex ↗ — checked October 11, 2026.
The decision
Consider the 2100tn only for a verified wired legacy setup that can accept manual duplex and whose drivers and used condition have been checked.
Is it the right fit?
Check the exact model and today’s offers on Amazon.