#networkdesign

2026-01-11
Andrea :prami: ๐Ÿ‡ฎ๐Ÿ‡น ๐Ÿ‡ฌ๐Ÿ‡งandreab@social.lol
2025-12-20

Three years ago, I was at a crossroads.

I already had my CCIE Routing & Switching for quite some time, and I was asking myself the big question: whatโ€™s next?
DevNet? CCIE Security? I started exploring bothโ€ฆ but something kept pulling me towards one thing: design. The kind of work where you donโ€™t just make networks run, you make them make sense.

So I went all-in.

I poured every spare hour into the CCDE path, starting with the written exam (400-007). In June 2024 I passed the CCDE Written in Las Vegas and thought, right, now itโ€™s โ€œjustโ€ the practical.

I knew the practical would be tough.
I did not expect it to take a year and a half of my life.

Early mornings. Most weekends. A few nights every week with the study group.
And, if Iโ€™m being brutally honest, a lot of it was time borrowed from my family. Time they graciously sacrificed with me, even when it wasnโ€™t fun, even when it dragged on.

But todayโ€ฆ I walked into the Cisco office in London knowing it was the day.
Almost 7 hours exam (yes, I finished a bit early). Then, I waited. Waited. And waited. In the end, the email arrived.

โ€œ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—–๐—–๐——๐—˜ ๐˜€๐˜๐—ฎ๐˜๐˜‚๐˜€ ๐—ถ๐˜€ ๐—–๐—ฒ๐—ฟ๐˜๐—ถ๐—ณ๐—ถ๐—ฒ๐—ฑ (๐—–๐—–๐——๐—˜ ๐Ÿฎ๐Ÿฌ๐Ÿฎ๐Ÿฑ๐Ÿฌ๐Ÿฌ๐Ÿฒ๐Ÿฐ)โ€

Iโ€™m proud. Iโ€™m relieved. And Iโ€™m genuinely grateful.

To my study group: you kept me accountable when motivation wasnโ€™t enough.
To my family: you carried a chunk of this journey with me.
To everyone whoโ€™s grinding through something big right now: keep going, but donโ€™t forget why you started.

Nowโ€ฆ Iโ€™m going to take a breath. Then Iโ€™ll decide whatโ€™s next. ๐Ÿ™‚

#CCDE #CCIE #CCNP #CCNA #NetworkDesign #Cisco #CareerJourney #Learning #NeverStopLearning

Sonia SongSonia_Song
2025-12-19

๐Ÿ”Œ PoE switches solve a classic pain point: power and data over one cable. No extra adapters, no clutter โ€” just reliable connectivity.

Ideal for tight spaces like offices, schools, or clinics.

Key features like AI self-healing, 2.5G uplink, and cloud management keep networks stable and smart.

Clean setup, steady performance.

Mohammad HajiaghayiMTHajiaghayi@mathstodon.xyz
2025-02-03

๐Ÿš€ Exciting update! My Network Algorithms and Approximations course continues with Lessons 2, 3 & 4 now available! ๐ŸŽ‰

๐Ÿ“Œ Topics covered:
โœ… Submodular (Set) Cover โ€“ Greedy log-approximation & Group Steiner Tree
โœ… Maximum Coverage โ€“ 1 - 1/e approx, LP relaxations & budgeted coverage
โœ… Unique Coverage โ€“ Log(n)-approximation, NP-hardness & max-cut ties

๐Ÿ”— Watch now:
โ–ถ๏ธ Lesson 2: youtu.be/xi6P3bqy61g
โ–ถ๏ธ Lesson 3: youtu.be/jC44JdD74Hw
โ–ถ๏ธ Lesson 4: youtu.be/ypzFnl0Wfp4

๐Ÿ“… New lectures premiere every Wednesday at 7PM ET!
๐Ÿ“บ Full playlist: youtube.com/playlist?list=PLx7

๐Ÿ”” Subscribe for more: youtube.com/@hajiaghayi

#Optimization #Algorithms #NetworkDesign #CombinatorialOptimization #MachineLearning #GraphTheory #SetCover #ApproximationAlgorithms

Mohammad HajiaghayiMTHajiaghayi@mathstodon.xyz
2024-12-08

๐Ÿš€ Excited to announce my 5th course, Network Algorithms and Approximations! ๐ŸŽ“ Explore NP-complete problems (Set Cover, Unique Coverage, etc.), approximation techniques, and applications in data science, neural nets, & network optimization.

๐Ÿ“บ First lecture: youtu.be/Tnm-8xieqB4
๐ŸŽฅ Weekly uploads: Wednesdays at 7 PM EDT. Playlist: youtube.com/playlist?list=PLx7

Plus, all 4 previous courses (Game Theory, Algorithms, Lower Bounds, Data Science) are online! ๐ŸŒ youtube.com/@hajiaghayi

#NetworkDesign #Optimization #NPComplete #Algorithms #DataScience #NeuralNets

LINUXexpert.orglinuxexpert
2024-07-23

IPsec, or Internet Protocol Security, is a suite of protocols designed to secure internet communication by authenticating and encrypting each IP packet of a communication session. It has long been associated with IPv4, but its relationship with IPv6 often stirs confusion and misinformation.
linuxexpert.org/ipsec-and-ipv6

@lucasmz@hachyderm.io

2024-04-18

Then again, why use a VPN if you have perfect DNS?
noise.cs.uchicago.edu/
medium.com/noise-lab/oblivious
[A: This thought criminal thinks that the EULAS and companies can't be trusted. So systems that are agnostic about who the sysadmins are as long as they are working like they were designed? Need anonymity for security.
ng27owmagn5amdm7l5s3rsqxwscl5y]

Researchers observe that tor node DNS uses Google resolvers often.
medium.com/noise-lab/noise-lab

Having high quality volunteer nodes is still important. A multi-hop VPN with high quality DNS could rival the security and privacy of tor, but high adoption of tor boosts anonymity.

#ODoH #Apple #VPN #tor #networkdesign #SecurityResearch
#uchicago #cs

2023-12-12

My latest blog revisits Cisco (and othersโ€™) segmentation, touching on some requirements debate topics that came up in a set of customer design sessions. #CCIE1773 #BlueAlly #NetCraftsmen #Cisco #NetworkDesign #Security #Segmentation netcraftsmen.com/securing-segm

๐ŸŒช MikeMathia.com ๐Ÿ“กmikemathia@ioc.exchange
2023-11-15
Stephen Brahamwarp@noc.social
2023-11-01

These two #Nokia reports are always important basic reading in the mission-crit #networkdesign game: lightreading.com/broadband/nok

Ryan in Minneapolisryaninmpls
2023-09-14

If you're looking for an engineer with a background in and door , , , and Level 2/Level 3 support look no further than right here.

I am looking immediately for new work. LinkedIn here: linkedin.com/in/d3photographer/

2023-09-08

I put together a few thoughts on
network #WAN design, taking a look at how adding more circuits/devices may help or hinder availability.

josh-v.com/designing-wan-avail

#Networking #NetworkDesign

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