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Channel

Network Admin

@networkadm

On this record: Topic · Growth · Engagement · What this channel posts · Reactions · Posts · Citations · Telegram's recommendations · Cite this entry

12,361subscribers

-65 since we began measuring on 7 August 2026

Risers and fallers across the register · movement among entries of 10,000–31,623.

Register entry

Telegram ID-1001898919043
TypeChannel
Username@networkadm
CreatedBetween 1 November 2022 and 31 July 2023 — estimated from Telegram’s id allocation, not measured. How this range is calculated.
First recorded7 August 2026
Last confirmed live4 October 2026
Measurements held31
Confirmed unchanged1 time, most recently 4 October 2026
On Telegramt.me/networkadm

Topic

Technology — a classification, not a measurement. An on-box language model (Qwen3.6-35B-A3B-FP8, prompt version 1) read this channel’s own recent posts on 11 September 2026 and assigned it the closest of 31 fixed categories, at 100% confidence. This is a model’s judgement about what the channel is likely to be about, not a fact this register measured the way a subscriber count or a view count is measured — it can be revised on a later pass, and it carries no weight anywhere else on this page. How this classification works, and why it has no browse page of its own yet.

Growth

12,36112,43912,4007 August 2026 — 12,426 subscribers7 August 2026 — 12,426 subscribers10 August 2026 — 12,421 subscribers11 August 2026 — 12,418 subscribers13 August 2026 — 12,417 subscribers14 August 2026 — 12,413 subscribers16 August 2026 — 12,412 subscribers17 August 2026 — 12,410 subscribers18 August 2026 — 12,407 subscribers19 August 2026 — 12,409 subscribers22 August 2026 — 12,432 subscribers23 August 2026 — 12,439 subscribers25 August 2026 — 12,437 subscribers26 August 2026 — 12,438 subscribers26 August 2026 — 12,430 subscribers28 August 2026 — 12,429 subscribers29 August 2026 — 12,426 subscribers30 August 2026 — 12,422 subscribers31 August 2026 — 12,419 subscribers1 September 2026 — 12,418 subscribers2 September 2026 — 12,415 subscribers3 September 2026 — 12,417 subscribers5 September 2026 — 12,411 subscribers8 September 2026 — 12,415 subscribers11 September 2026 — 12,409 subscribers13 September 2026 — 12,404 subscribers14 September 2026 — 12,401 subscribers16 September 2026 — 12,397 subscribers19 September 2026 — 12,394 subscribers25 September 2026 — 12,380 subscribers4 October 2026 — 12,361 subscribers7 August 20264 October 2026
31 measurements spanning 58 days, net -65. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 12,349–12,451 and does not start at zero.
Measurement log — every subscribers count we have recorded, most recent 20 of 31
Measured (UTC)SubscribersChange
4 Oct 2026, 03:1612,361-19
25 Sept 2026, 08:0012,380-14
19 Sept 2026, 00:2012,394-3
16 Sept 2026, 16:4012,397-4
14 Sept 2026, 16:5612,401-3
13 Sept 2026, 02:1512,404-5
11 Sept 2026, 04:4112,409-6
8 Sept 2026, 07:5712,415+4
5 Sept 2026, 03:0012,411-6
3 Sept 2026, 09:1312,417+2
2 Sept 2026, 01:4212,415-3
1 Sept 2026, 01:4612,418-1
31 Aug 2026, 02:2412,419-3
30 Aug 2026, 03:1812,422-4
29 Aug 2026, 01:2512,426-3
28 Aug 2026, 02:3512,429-1
26 Aug 2026, 23:5212,430-8
26 Aug 2026, 02:4312,438+1
25 Aug 2026, 02:0812,437-2
23 Aug 2026, 17:5712,439first reading

Engagement

39 posts held, back to 15 July 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 50 pages of Telegram’s post history, 20 posts per page.

Nothing published in the last 30 days. ERR and ER are rolling 30-day measures, so there is nothing to compute — we hold 39 posts for this entry, the most recent from 2 September 2026. An engagement rate over an empty window would be a number about nothing.

What this channel posts

Video runtime
10m 23s
Average length
10m 23s

Measured directly from 1 video with a duration reading, out of the posts we hold for this channel — not this channel’s whole posting history, only the sample this register has actually read. An exact reading to the second, taken from the post itself rather than from Telegram’s own rounded chrome, so it carries no ≈ mark.

Reaction mix

254 reactions across 39 posts, in 9 distinct kinds. The most used accounts for 52.0% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
👍13252.0%
❤7328.7%
🎉187.09%
🔥135.12%
😁135.12%
❤‍🔥20.787%
😱10.394%
🤔10.394%
🥰10.394%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 39 of the 39 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 254 reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 39 most recent posts we hold, published 15 July 2026 to 2 September 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Recent posts

2 Sept 2026, 09:25 UTC690 views2 reactionsread 2 September 2026
Photo

Почему BGP может выбрать более длинный путь В BGP легко представить выбор маршрута как простое правило: меньше AS в пути - лучше. Но AS-path length - только один из атрибутов, которые участвуют в best-path selection. Например, маршрутизатор получил: 10.10.10.0/24 peer A: AS_PATH 64501 64502 peer B: AS_PATH 64503 64504 64505 На первый взгляд BGP должен выбрать A. Но если у маршрута от B выше LOCAL_PREF, он мож…

👍2

1 Sept 2026, 09:15 UTC823 views4 reactionsread 2 September 2026
Photo

Как локальный трафик может вообще не попадать на физический интерфейс Если приложение обращается к IP, который Linux считает своим локальным адресом, пакет не отправляется на физический интерфейс. Например, на сервере: eth0 → 10.0.0.10/24 Приложение выполняет: curl http://10.0.0.10:8080 Интуитивно кажется, что будет: application ↓ eth0 ↓ switch ↓ eth0 ↓ server Но Linux сначала проверяет destin…

🔥4

31 Aug 2026, 14:47 UTC≈1,040 views5 reactionsread 2 September 2026
Photo

📂Gratuitous ARP меняет ARP-кэш без единого ARP-запроса Обычно ARP работает так: Host A → Who has 10.0.0.10? Host B → 10.0.0.10 is aa:bb:cc:dd:ee:ff Но устройство может само отправить ARP-пакет, не дожидаясь никакого запроса. Это и есть Gratuitous ARP. Например, виртуальный IP переезжает: до: 10.0.0.10 → aa:aa:aa:aa:aa:aa после: 10.0.0.10 → bb:bb:bb:bb:bb:bb Новое устройство отправляет объявление: 10.0.0.10 …

❤4👍1

28 Aug 2026, 09:32 UTC≈1,630 views4 reactionsread 2 September 2026
Photo

Большой RX ring не всегда делает сеть быстрее У сетевой карты есть очереди, куда складываются входящие пакеты, пока драйвер не успел их обработать. При burst-трафике большой ring действительно может помочь пережить кратковременный всплеск: NIC → RX ring → driver → kernel Но бесконечной очереди не бывает. Если CPU стабильно обрабатывает, например, 500 тыс. пакетов/с, а приходит 700 тыс.: 500k → 700k → 900k → ...…

👍4

27 Aug 2026, 09:31 UTC≈1,610 views7 reactionsread 2 September 2026
Photo

Сетевой пакет может потеряться ещё внутри NIC В tcpdump нет пакета - легко сделать вывод, что он не пришёл на сервер. Но между физическим портом и tcpdump находится сама сетевой карта. У NIC есть собственные RX ring buffers. Драйвер забирает из них дескрипторы и передаёт полученные данные ядру. При перегрузке очередь может не успеть обработать входящие пакеты: NIC ↓ RX ring ↓ driver ↓ kernel ↓ tcpdump Если п…

👍5❤2

26 Aug 2026, 11:10 UTC≈1,530 views6 reactionsread 2 September 2026
Photo

📂 Linux bridge учит MAC-адреса почти как обычный коммутатор Когда Linux работает как bridge, он не просто механически пересылает Ethernet-кадры между интерфейсами. У него есть собственная forwarding database - FDB. Когда кадр приходит на bridge, ядро смотрит на его source MAC и запоминает, откуда он пришёл: aa:bb:cc:dd:ee:01 → eth0 aa:bb:cc:dd:ee:02 → eth1 Посмотреть таблицу можно: bridge fdb show После этого …

👍6

25 Aug 2026, 10:20 UTC≈1,410 views5 reactionsread 2 September 2026
Photo

Пакет можно отбросить до создания skb Обычно сетевой пакет проходит довольно длинный путь внутри Linux: NIC → driver → skb → network stack → socket → application Но skb создаётся не в самом начале. XDP может выполнить программу прямо на раннем этапе обработки пакета, когда драйвер уже получил его из NIC, но обычный sk_buff ещё не создан. Поэтому решение можно принять буквально на входе: NIC ↓ driver ↓ XDP ├─…

👍3❤2

24 Aug 2026, 10:15 UTC≈1,500 views6 reactionsread 2 September 2026
Photo

Почему ss показывает тысячи соединений, а netstat - другую картину На одном сервере можно запустить: ss -ant и получить тысячи TCP-соединений, а затем: netstat -ant и увидеть совсем другое количество. Это не обязательно означает, что один из инструментов врёт. ss работает через современный интерфейс ядра Linux - NETLINK_INET_DIAG. Ядро отдаёт ему информацию о сокетах напрямую, поэтому ss может получать состояние…

👍6

21 Aug 2026, 09:35 UTC≈2,100 views6 reactionsread 2 September 2026
Photo

Один VLAN может проходить через несколько коммутаторов без единого L3-интерфейса VLAN не привязан к конкретному коммутатору. Если между устройствами настроен trunk, один и тот же broadcast domain может растянуться через несколько физических узлов. Например: PC ── SW1 ══ SW2 ══ SW3 ── Server VLAN 30 VLAN 30 VLAN 30 На trunk-портах кадр VLAN 30 идёт с тегом 802.1Q. Проверка на Linux: ip -d link show et…

❤6

20 Aug 2026, 09:10 UTC≈2,180 views12 reactionsread 2 September 2026
Photo

Ping 1 мс не всегда означает, что сеть работает быстро (но почему?) Можно получить RTT в 1–2 мс и при этом иметь очень плохую передачу данных. ping проверяет только время прохождения ICMP-пакета туда и обратно. Он почти ничего не говорит о том, сколько пакетов реально теряется, насколько забит канал и что происходит с TCP при передаче. Например, при потере даже небольшого процента TCP-пакетов скорость может резко …

👍8❤4

19 Aug 2026, 09:32 UTC≈2,010 views6 reactionsread 2 September 2026
Photo

Почему TCP-порт 443 - это не обязательно один TCP-порт? Когда говорят «сервер слушает 443 порт», легко представить один socket, который принимает все HTTPS-соединения. Но TCP идентифицирует соединение не только по порту назначения. Для него важна комбинация: src IP + src port + dst IP + dst port Например, сервер слушает: 10.0.0.10:443 А клиенты создают: 10.0.1.20:49152 → 10.0.0.10:443 10.0.1.21:49153 → 10.0.0…

👍6

18 Aug 2026, 13:20 UTC≈1,510 views3 reactionsread 2 September 2026
Photo

📂 Почему Linux иногда отбрасывает корректный пакет из-за rp_filter Ситуация выглядит странно: маршрут до сервера есть, интерфейс поднят, tcpdump показывает входящие пакеты, но соединение не устанавливается. Одна из причин - Reverse Path Filtering. 1️⃣Что происходит Linux получает пакет от 10.20.30.50 на eth1 и проверяет, через какой интерфейс он сам отправил бы трафик обратно к 10.20.30.50. Если маршрут указывае…

👍3

Showing the 12 most recent of 39 posts we hold for @networkadm. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Forward network

Republished by

Channels on the register that have forwarded this channel's posts into their own feed.

Republishes

Channels on the register whose posts this channel has forwarded.

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 2 registered channels — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

Named by

Channels on the register whose posts name this channel's handle.

Names

Channels on the register whose handles appear in this channel's posts.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Appears in Telegram’s recommendations for other channels

The reverse of the list above, and a different kind of signal. This does not require this channel to have ever been asked about directly — each row below is a channel we DID ask Telegram about, whose Telegram-generated list happened to include this one. A channel can appear here with an empty list above it, because being named by someone else’s query is independent of having been queried itself.

Серверная Админа | Компьютерные сети
@school_network · 26,560
Telegram ranks this channel #4 of 85 here — alongside 84 others — read 12 September 2026
Linux для чайника
@os_linux_ru · 19,602
Telegram ranks this channel #15 of 87 here — alongside 86 others — read 1 October 2026
Системный администратор
@i_odmin · 26,681
Telegram ranks this channel #22 of 89 here — alongside 88 others — read 12 September 2026
Книги для Системного Администратора
@i_odmin_book · 18,737
Telegram ranks this channel #23 of 83 here — alongside 82 others — read 5 October 2026
ZeroDay | Кибербезопасность
@cybersec_academy · 42,827
Telegram ranks this channel #29 of 70 here — alongside 69 others — read 29 August 2026
Kali Linux
@linuxkalii · 55,481
Telegram ranks this channel #30 of 89 here — alongside 88 others — read 23 August 2026
MikroTik-сэнсэй
@mikrotik_sensei · 19,556
Telegram ranks this channel #32 of 92 here — alongside 91 others — read 1 October 2026
ServerAdmin.ru
@srv_admin · 32,593
Telegram ranks this channel #33 of 96 here — alongside 95 others — read 5 September 2026
S.E.Book
@S_E_Book · 23,139
Telegram ranks this channel #40 of 64 here — alongside 63 others — read 19 September 2026
InfoSec Portal
@cybersecinform · 19,286
Telegram ranks this channel #44 of 75 here — alongside 74 others — read 2 October 2026
no system is safe // cybersec
@nsis_cybersec · 21,516
Telegram ranks this channel #44 of 71 here — alongside 70 others — read 23 September 2026
infosec
@it_secur · 62,254
Telegram ranks this channel #44 of 81 here — alongside 80 others — read 22 August 2026
Mr. Robot
@elliot_cybersec · 38,849
Telegram ranks this channel #49 of 70 here — alongside 69 others — read 31 August 2026
Бункер Хакера
@book_academ · 21,410
Telegram ranks this channel #51 of 72 here — alongside 71 others — read 23 September 2026
Этичный Хакер
@hack_less · 240,669
Telegram ranks this channel #52 of 81 here — alongside 80 others — read 12 August 2026
Лаборатория хакера
@lab_hack · 25,611
Telegram ranks this channel #60 of 71 here — alongside 70 others — read 14 September 2026
Типичный Сисадмин
@sysodmins · 38,258
Telegram ranks this channel #62 of 93 here — alongside 92 others — read 31 August 2026
Windows Community
@wind_community · 41,159
Telegram ranks this channel #62 of 74 here — alongside 73 others — read 29 August 2026
Секреты сисадмина | DevOps, Linux, SRE
@sysadmin_library · 25,522
Telegram ranks this channel #64 of 85 here — alongside 84 others — read 13 September 2026
Linux Academy
@linuxacademiya · 28,459
Telegram ranks this channel #65 of 84 here — alongside 83 others — read 9 September 2026
Белый хакер
@bezopasno_soft · 29,634
Telegram ranks this channel #74 of 78 here — alongside 77 others — read 8 September 2026
1С Hacks | Бухгалтерия и Учёт
@secrets_1C · 46,304
Telegram ranks this channel #75 of 79 here — alongside 78 others — read 27 August 2026
Базы данных | Access, SQL, Big Data
@databases_secrets · 30,086
Telegram ranks this channel #80 of 82 here — alongside 81 others — read 7 September 2026
Social Engineering
@Social_engineering · 124,999
Telegram ranks this channel #80 of 82 here — alongside 81 others — read 13 August 2026

This channel appears in 28 seed channels' Telegram-generated recommendation lists in total, of which the 24 where it ranks highest are shown above. Each is Telegram’s list for THAT channel, not this one — see how this is measured.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 4 October 2026 — this entry's latest reading, not the date you are reading this.

“Network Admin” (@networkadm), 12,361 subscribers as measured 4 October 2026. Telegram Register, tgregister.com/channel/networkadm.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.