
What are these ports, transceivers, patch cords for? How to deal with all this? And in general, is it necessary or easier to do with “improvised means” like “well-compressed RJ45”?
Instead of a foreword
SFP ! — : « , « ». 1GBE 10GBE ? 10 Gigabit !»
, ? 6 Gigabit Ethernet ( , ) 6 10 Gigabit Ethernet . !
, 100 ( ). 100 , .
, 20 . , 10 Uplink.
: 3 24 Uplink 10 Gigabit Ethernet, 10 Uplink .
10GBE. .
. , , — 100, , , , — , 550 . ?
- . :
, , Uplink 10 Gigabit Ethernet .
— — Uplink 550 , « ».
Uplink 550 .
. , 10 Gigabit Ethernet .
, ?
«». « » ( , ) Uplink 40GBE 100GBE. , Uplink Downlink (Downlink — ) , …
: ? - , ? ? ? , , , ?
, () .
, SFP. , , , SFP+ XFP. .

1. 28- 10GbE L2+ — Zyxel XS3800-28, SFP+.
. . , . , : Cisco, . , , .
, . , .
, SFP (Small Form-factor Pluggable) 1U 19 , . 48 2 Uplink. SFP .

2. L3 Zyxel XGS4600-52F 48 Gigabit Ethernet SFP, Uplink 10 Gigabit Ethernet SFP+
SFP :
- Fast Ethernet (100 Mb/s);
- Gigabit Ethernet (1 Gb/s);
- SDH (155 Mbps, 622 Mbps, 1.25 Gbps, 2,488 Gbps);
- Fibre Channel (1, 2, 4, 8 Gbps).

3. Zyxel SFP10G-SR SFP Plus 10 Gigabit Ethernet

4. 10GbE Fiber FTLX1412D3BCL
, , , Ethernet Fibre Channel . , , « ».
SFP
SFP . LC .
, , SFP WDM, , RJ45, .
SFP :
- 550 — ;
- 20, 40, 80, 120, 150 .
SFP (RX) (TX).
, : (MM) (SM).
, . SFP : .
: WDM, CWDM DWDM.
SFP 850 (, ).
. (TX1\<—>RX2, RX1\<—>TX2).
( ), , , , .
, ( 550).
SFP 1310, 1550. . SFP 120.
. .
SFP WDM — Wavelength Division Multiplexing ( ). ( WDM Bi‑Directional, Bi‑Di) . : 1310 1550.
1550 1310.
: , 1310 1550.
240, , , .
. SFP WDM SC .
SFP CWDM — Coarse WDM — «» WDM — WDM . SFPCWDM , , , 1270 1610:
2 1270 1290;
16 (1310 — 1610 20).
, 2 . , 16 , . «» , , «» . .
, 10 Direct Attached Cable (DAC) SFP+, 10GBASE 10G Ethernet, 8/10G Fibre Channel. , , , .

5. DAC10G-3M Direct Attach
SFP SFP+
SFP , — . 10 Gigabit. , SFP+
— SFP+ SFP . SFP+, SFP, — , .
. ( , Zyxel ) . , .
XFP
XFP XFP MSA (Multi Source Agreement). 10G .
: 850, 1310 1550, XFP :
- 10 Gigabit Ethernet;
- 10G Fibre Channel;
- (SONET) OC 192;
- STM 64;
- 10G (OTN) OTU 2;
- .
. SFP+ — . — , , SFP . , . ( , SFP+) — XFP.
XFP SFP+
, , .
, XFP‑10G-SR SFP‑10G-SR — LC , LC .
— (, . .) .
.
, . , . .
, (, ), .
10- Ethernet:
10
SFP SFP+. .
SFP (SFP+) ?
SFP (SFP+) ? 2.0
CWDM —