Long story short: packet loss and ping jitter on a LAN PC been a problem for a year now and ISP has no clue what to do or where to look.

• Router upgraded (2Gbps download)
• New CAT-7 cable installed
• Same issue appears on multiple devices and servers/tests
• Limiting bandwidth / turning off wifi completely doesn't help the issue
• Ping to router is always stable <1ms
• Ping to anything else permanently jitters no matter what
• Internet used to be flawless for 10 years, I've changed nothing on my end til this occured

One very interesting hint is that when I run waveform's bufferbloat test (which I always score D or F because I get +600ms download latency under load) and it finishes, the following 30 seconds my internet is literally perfect 0ms jitter but then returns to garbage.

I highly suspect the issue is in the ISP's infrastructure and cables outside of my house but I'm unsure how to confirm while they are taking their time on it :)

I will be infinitely grateful if anyone takes some time to help solve this because I'm genuinely curious what is causing it and I'm going insane.

Que pasaría.. si de un momento a otro el Internet empieza a fallar en todo el mundo, no solo unas horas si no que nos quedemos así bastante tiempo.. y por que no hay una película de "terror" de esto? O si la hay?

Interested?

I am cs student and i want start learning networking for my cybersecurity dgree is networking basics course good to start with it ,is it worth that 22 hours ? And if not what is the best ressources for networking learning path?

I live in a dorm and I haven't been able to connect to the dorm's internet since I arrived. They connected me a couple of times by taking my IP address. But I lost connection again. I also can't use my own internet on the computer. I turn on mobile hotspot, connect it to the computer, it shows as connected, but I can't access any websites. Does anyone know a solution?

Please advice

crossposting here - Trying to connect 10/25gpbs Ubiquiti switch to a 1gbps firewall. will this soluition work? Does the GBIC communicate to switch at 10gbps but send 1gbps over the copper to the other device?

Is there any way to like look through the nethernet protocol’s code to find bugs or anything?

Hallo zusammen,
hier eine Frage an alle Netzwerkexperten. Ich nutze zu Hause eine Playstation Portal mit einer völlig neuen Fritz Box 6690 Pro. Die Portal bringt jedes Mal nach unterschiedlicher Zeit (5-30min) das gelbe Symbol für Netzwerkprobleme. Die Verbindung ist dann ganz kurz weg, ca. 1sek Lag und dann bleibt das gelbe Symbol dauerhaft. Wenn ich eine zusätzliche Fritzbox 7490 per LAN mit der 6690 verbinde und die Portal dann ein eigenes WLAN über die 7490 bekommt, wo nur die Portal aktiv ist, dann passiert das nicht und ich kann die Portal stundenlang ohne Probleme betreiben.

Warum ist das so?

Ich habe versucht mit Hilfe der KI einen Weg zu finden, dass die Portal stabil über die 6690
Pro alleine läuft, weil ich mir eigentlich den zusätzlichen Router und Stromverbrauch sparen will. Aber ich finde keinen Weg…

PS5 ist per Ethernet verbunden.
Ich habe wirklich sehr sehr viel schon versucht, z.B.
- feste IP-Adressen für Ps5 und Portal
- HDMI Kabel an PS5 gezogen
- separate WLAN-SSIDs
- Portal nur ins 5 GHz Netz gezwungen
- Datenpaketfilter in den tiefsten versteckten Menüs der Fritzbox testweise umgestellt
- Echtzeitpriorisierung für PS5 und Portal aktiviert
- verschieden Filter getestet
- Selbstständige Portfreigaben für PS5 und Portal aktiviert
- 120Hz Einstellungen in PS5 testweise ausgemacht
usw.
- WLAN Kanaleinstellungen geändert auf feste Kanäle oder Auto

Nichts davon hilft, um die PS Portal zusammen mit dem 6690 Pro allein stabil zu halten. Aber warum funktioniert es dann mit einem zusätzlichen Router, der ein weiteres WLAN Netz mit Interferenzen aufspannt? Ich verstehe das nicht. Kann mir das einer erklären? Kann ich noch irgendwas machen oder einstellen in der 6690, damit es ohne den zweiten Router funktioniert? Oder ist das einfach nicht möglich?

Hi guys. I’m kind of a beginner when it comes to routers and stuff. I’m moving into a new house next week and i was planning on buying a sim card and paying monthly with an unlimited data plan and putting it into a router. Is this possible? Is there anything i should look out for like what routers are compatible with sim cards etc? I’m worried i’m going to buy the wrong router. I live in the UK. Thanks guys.

[ Removed by Reddit on account of violating the content policy. ]

In a 4 way handshake the client and AP generates an Anonce and Snonce that means it has other encryption keys for different devices.If it has other keys (PTK) how does the other client knows what's in the packets? Does the router decrypts them and encrypts them with the other key?

Thanks!

I recently applied for a Network Operations position at a large financial services company, and I’m curious to hear some opinions from people who have experience working in similar environments.

Currently, I work as a NOC Engineer for an MSP, where I spend most of my day troubleshooting network issues across multiple client environments and managed properties. It’s a fast-paced environment that exposes me to different networks, configurations, and challenges.

My question is: How much can you really learn and grow as a Network Engineer working for a company whose primary business is finance rather than networking or IT services?

In this case, I assume I would mainly be responsible for the company’s internal network infrastructure across multiple offices throughout the United States, rather than working with different clients and network environments like I do now.

For those who have made a similar transition, how was your experience? Did you find that working in an enterprise environment helped you develop deeper networking skills, or did you feel that the exposure was more limited compared to working for an MSP?

I’d appreciate any insights, especially from network engineers who have worked in both environments. I’m trying to understand the potential for technical growth and career development in this type of role.

Just a simple question is ethernet encrypted with for example WPA2 like wifi is? Or is it just not needed?