Yes I linked to the el cheapo Amazon network cable tester. My original nice "el cheapo" tester was an Ebay purchase from China at the time.
New here is different than the old continuity RJ45 testers with LED lamps which is what I used in the 1990's to wire up my house to DSL Internet at the time. These were very cheap at $20 and still being sold today.
The better newer testers make sure you have your pairs in order on the LCD display.
I used one when I switched my outside in berm IP cameras to POE and noticed that most of them were wired incorrectly. (RJ45's at each end) over 15 years ago.
The Amazon $50 tester checks continuity, order of the 4 pairs of wires (they have to be connected in order) and length of cable for proper functioning.
Amazon el cheapo tester and toner for $52.99 "New Style" first purchased from Ebay 15 years ago.
KOLSOL Network Cable Tester, Ethernet Wire Tracer with NCV & Lamp for CAT5 CAT6, PoE Tester Detect Voltage Measure Fault Distance by TDR NF-8209
Digital cable scanning NF-8209 lan cable tester is a new generation to offer AC filter and analog signaling all in one network toner and probe. It has three modes for options to track cable like AC filter mode, analog mode and PoE mode.
Fault distance location Rj45 cable tester measure cable length and locate fault distance accurately for lan cable. the range is 200m.That means it's equipped with the most powerful cable location technologies for any work environment.
Multi Function Network cable tester kit includes cable length measurement , cable faults testing, PoE testing, hub blink and NCV function, all these makes it a must-tool for cabling engineers.
PoE information testing & Hub blink Identify which pins are providing power and detect how much voltage, identify which the type of PSE (at/af standard).Locate network port by the flashing port light on Hub / Switch. Available to 10M/100M Hub/ switch.
Cable continuity testing & NCV test physical status for STP, UTP lan cable. Detect AC voltage presence (50V-1000V).
Better yet would be this one for $173.49
Klein Tools VDV501-852 Cable Tester with Remote, VDV Scout Pro 3 Test Kit Locates and Tests Voice, Data and Video Cables
Cable tester for voice (RJ11/12), data (RJ45) and video (F-connector) coax connections
Self-storing Test + Map Remote (#1) tests, maps and IDs a cable run in a single step
Power over Ethernet Tester that displays PoE wire and Voltage
Trace cables, wire pairs and individual conductor wires with a tone generator (requires analog probe Cat. No. VDV500-123; sold separately)
Measures cable length up to 2,000 feet (610 m)
Identify multiple cable runs with location-mapping remotes Identify
Identify 18 RJ45 and 18 F-connector drop locations with large easy-to-read numbers
Detect, identify and test Power over Ethernet (PoE)
Doing the above with a tester you will see any faults in wiring et al.
If you do not see any faults then your transport will work fine...IE: PC to PC or PC to router et al.