Domain 4: Communication and Network Security Pt 2 Flashcards
- LAN Technology
- Numerous devices communicate over the same medium but take turns in communicating i.e. full and half duplex
- Broadcast and collision domain
Ethernet
- LAN Technology
- Uses a token-passing mechanism to control which systems can transmit data over the network medium
- Employed on ring or star network topologies
Token Ring
- LAN Technology
- High-speed employs two token rings with traffic flowing in opposite directions
- Often used as a backbone for large enterprise networks
- Dual ring design allows for self-healing removing the failed segment from the loop
Fiber Distributed Data interface (FDDI)
Name some protocols listed in the OSI Application layer
HTTP, FTP, LPD, SMTP, Telnet, TFTP, EDI, POP3, IMAP, SNMP, NNTP, S-RPC, and SET
Name some protocols listed in the OSI Presentation layer
Encryption protocols and format types, such as ASCII, EBCDICM, TIFF, JPEG, MPEG, and MIDI
Name some protocols listed in the OSI Session layer
NFS, SQL, and RPC
Name some protocols listed in the OSI Transport layer
SPX, SSL, TLS, TCP, and UDP
Name some protocols listed in the OSI Network layer
ICMP, RIP, OSPF, BGP, IGMP, IP, IPSec, IPX, NAT, and SKIP
Name some protocols listed in the OSI Data Link layer
SLIP, PPP, ARP, L2F, L2TP, PPTP, FDDI, ISDN
Name some protocols listed in the OSI Physical layer
EIA/TIA-232, EIA/TIA-449, X.21, HSSI, SONET, V.24, and V.35
What protocol and port does Line Print Daemon (LPD) use?
TCP Port 515
What protocol and port does Simple Mail Transfer Protocol (SMTP) use?
TCP port 25
What protocol and port does Post Office Protocol (POP3) use?
TCP port 110
What protocol and port does Internet Message Access Protocol (IMAP) use?
TCP port 143
- Cables that transmit only a single signal at a time
- Most networking cables
- Form of a digital signal
- i.e. Ethernet
Baseband
- Cables that transmit multiple signals simultaneously
- Form of a analog signal
- i.e. Cable TV and modems, ISDN, DSL, T1, and T3
Broadband
- Rely on a timing or clocking mechanism embedded in the data stream
- Supports high rates of data transfer
Synchronous communications
Continuous signal that varies in frequency, amplitude, phase, voltage, and so on
Analog Communications
- Uses a direct current voltage where voltage on represents value of 1 and voltage off represent value of 0
- More reliable over long distances or when interference is present
Digital communication
- Type of coaxial cable
- Can span distances of 185 meters and throughput up to 10 Mbps
10Base2 (thinnet)
- Type of coaxial cable
- Can span distances of 500 meters and throughput up to 10 Mbps
10Base5 (thicknet)
- Rely on a stop and start delimiter bit to manage the transmission of data
- Best suited for smaller amounts of data
- i.e. PSTN modems
Asynchronous communications
- Contains a metal foil wrapper that goes around the wires underneath the external sheath
- Reduces EMI and are more expensive
Shielded twisted-pair (STP)
Twisted-pair cabling without the metal foil wrapper
Unshielded twisted-pair (UTP)
- UTP cable type
- Max speed: 10 Mbps
- Distance: 100 meters
- Difficulty of installation: Low
- Susceptibility to EMI: High
10BaseT
- UTP cable type
- Max speed: 100 Mbps
- Distance: 100 meters
- Difficulty of installation: Low
- Susceptibility to EMI: High
100BaseT/100BaseTx
- UTP cable type
- Max speed: 1 Gbps
- Distance: 100 meters
- Difficulty of installation: Low
- Susceptibility to EMI: High
1000BaseT
- Max speed: 155 Mbps
- Distance: 100 meters
- Difficulty of installation: Medium
- Susceptibility to EMI: Medium
STP
- Max speed: 2+ Gbps
- Distance: 2+ kilometers
- Difficulty of installation: High to medium
- Susceptibility to EMI: None
Fiber-optic
- Consists of four pairs of wires that are twisted around each other then sheathed in a PVC insulator
- The tighter the twist the more resistant the cable is to internal and external interference and crosstalk, thus the capacity for bandwidth is greater
- i.e. shielded twisted-pair (STP) and unshielded twisted-pair (UTP)
Twisted-pair cabling
