Vocabulary List R + S
| R reference point | RAM | RARP | rate queue | RCP | redistribution | redundancy | RJ connector | reload | RIF |
| ring | ring topology | RIP | ROM | root bridge | routed protocol | route poisoning | route summarization | router | routing |
| routing domain | routing metric | routing protocol | routing table | RP | RSP | RTS | S reference point | sampling SAP SCR | SDLC |
| seed router | server | set-based | Session layer | setup mode | SF | signaling packet | silicon switching | simplex | sliding window |
| SLIP | SMDS | SMTP | SNA | SNAP | socket | SONET | SP | span | SPAN |
| spanning explorer packet | spanning tree | spanning-tree algorithm (STA) | Spanning-Tree Protocol (STP) | SPF | SPID | split horizon | spoofing | spooler | SPX |
| SQE | SRB | SRT | SR/TLB | SSAP | SSE | standard IP access list | standard IPX access list | star topology | startup range |
| state transitions | static route | static VLANs | statistical multiplexing | STM-1 | store-and-forward packet switching | STP | stub area | stub network | STUN |
| subarea | subarea node | subchannel | subinterface | subnet | subnet address | subnet mask | subnetwork | SVC | switch |
| switch fabric | switched LAN | synchronous transmission |
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