Routing protocols

Name IGP or EGP Type VLSM? Updates Algorithm Metric Convergence Port/Protocol Administrative distance
RIP interior (intra-AS) distance vector classful broadcast full routing table periodically Bellman-Ford hop count slow UDP 520 120
RIP-2 interior (intra-AS) distance vector classless multicast full routing table periodically Bellman-Ford hop count slow UDP 520 120
IGRP interior (intra-AS) distance vector classful ?broadcast/multicast full routing table periodically constrained bandwidth and cumulative delay (optionally others) slow IP 9
OSPF interior (intra-AS) link state classless LSA. partial updates to topology to known neighbors Dijkstra shortest paths sum of links' cost (cumulative bandwidth) fast IP 89 110
EIGRP interior (intra-AS) balanced hybrid (or DV) classless partial updates of topology to neighbors DUAL constrained bandwidth and cumulative delay (optionally others) * 256 very fast IP 88 90
BGP exterior (inter-AS) hybrid classless routes with ASN to peers none. policies TCP 179
Administrative distance of connected is 0, static is 1, DHCP default 254.
0.0.0.0/0 default route [gateway of last resort]

Graphics image file formats:
Compressed: GIF and PNG for drawings. JPEG for photos.
Uncompressed bitmaps: BMP TIFF

?? Buses:
Internal:
PCI expansion bus. Express
ATA/IDE SATA for drives.
Internal/external:
SCSI: various versions, connectors
External:
PCMCIA/PC Card.
USB
Firewire (IEEE 1394)

Backups
Name action # tapes needed archive bit reset/cleared restore procedure
Full all files copied to tape 1 yes this tape
Differential all changed files since last full backup 1 no full backup tape then the one differential
Incremental all changed files since last incremental or full #incremental backups yes full backup tape then each incremental tape in order made
Tape formats: DAT DLT LTO QIC 8mm
Backups: grandfather (montly) father (weekly) son (daily)

RAID for fault tolerance and/or performance
Level Name # disks performance
improvement
data availability
fault tolerance
0 Striping 2 - yes no
1 Mirroring / Duplexing (duplicate host adapter/controller) 2 no yes (good for OS)
5 (deprecated) Striping with parity 3 - 16 yes yes
6 (most common) 2 parity stripes 5? - 60 OK. yes. 2 HD
10 (1+0) nested: mirrored striped $$$ 4 - ? yes yes. 2+ HD
60 (6+0) nested: mirrored striped $$$ 16 - 60? yes yes. 4 HD

Hardware (controller card or on motherboard ["fake"]) vs kernel.
198 TB 48-disk array
External storage: USB 3.1 5Gbps, USB 3.2 10Gbps, 10 GbE, Thunderbolt 3 40Gbps, 40 GbE

HA cluster
notepad virus yes, it's a virus. just don't run it on Windows.