Term
Physical Topology Types:
Bus Physical Topology |
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Definition
- Single cable connecting all devices
- Terminators at cable ends prevents reflection |
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Term
Physical Topology Types:
Ring Physical Topology |
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Definition
- Single wire in continuous loop
- One-way signal in circular motion |
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Term
Physical Topology Types:
Star Physical Topology |
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Definition
- All devices connect to central device
- Advantage: one cable down does not bring down the others
- Disadvantage: central point of failure
- Requires hybrid hub |
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Term
Physical Topology Types:
Mesh Physical Topology |
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Definition
- Recommended method
- All devices connected to every other
- Full redundancy |
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Term
Logical Topology Types:
Bus Logical Topology |
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Definition
| - Info travels from one client to all others on network |
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Term
Logical Topology Types:
Ring Logical Topology |
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Definition
| - Info travels in circular path b/t all clients on network |
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Term
Network Architecture:
802.3 |
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Definition
- Ethernet standard
- Access method: CSMA/CD |
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Term
Network Architecture:
802.11 |
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Definition
- Wireless standard
- Access method: CSMA/CA |
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Term
Cable Characteristics:
10-Base-T |
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Definition
Speed - Length - Cable Type - Topology
10Mbs 100 m CAT 3+ Ethernet |
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Term
Cable Characteristics:
1000-Base-T |
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Definition
Speed - Length - Cable Type - Topology
1Gbs 100 m CAT 5e+ Ethernet |
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Term
Cable Characteristics:
1000-Base-SX |
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Definition
Speed - Length - Cable Type - Topology
1Gbs 550 m Multimode Ethernet
Fiber |
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Term
Cable Characteristics:
1000-Base-LX |
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Definition
Speed - Length - Cable Type - Topology
1Gbs 5000 m Single Mode Ethernet
Fiber |
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Term
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Definition
Usage: analog telephone systems
POTS - 4 pins, 2 wires
Remote Access Servers
Pub. Switched Tele Networks |
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Term
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Definition
| Usage: Ethernet connection |
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Term
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Definition
Usage: cable boxes, VCRs
splitter on cable modem |
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Term
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Definition
"Set and Twist"
Usage: Gigabit ethernet |
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Term
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Definition
"Set and Click"
Usage: Gigabit ethernet |
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Term
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Definition
"Firewire"
Usage: digital video serial bus
400 Mbps
1394b (FW 2) = 800 Mbps |
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Term
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Definition
Usage: Gigabet ethernet
small form factor connector |
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Term
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Definition
Usage: connect peripherals to the CPU
only 11 Mbps
USB 2.0 = 450 Mbps |
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Term
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Definition
| ethernet based networks @ 10 Mbps |
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Term
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Definition
| Eth. Based Net @ 100 Mbps (100 m max) |
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Term
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Definition
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Term
Wire:
Unshielded Twist Pair (UTP) |
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Definition
| same as CAT 3, 5, 5e, and 6 |
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Term
Wire:
Shielded Twist Pair (STP) |
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Definition
| provides extra EMI protection |
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Term
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Definition
- Layer 1: Physical Layer
- info in 1 - out all
- dumb device |
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Term
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Definition
- Layer 2: Data Link Layer
- Smart device
- Info in 1 - out on specific port
- Decision based on MAC address
- Break up single collision domain and make multiple collision domains |
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Term
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Definition
- Layer 2: Data Link Layer
- Connects 2 different LAN segments
- Decisions based on MAC address |
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Term
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Definition
- Layer 3: Network Layer
- Decisions based on IP address
- Ethernet and serial ports
- Connection b/t LAN and WAN
- 1 broadcast domain to several broadcast domains |
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Term
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Definition
- Layers 5-7
- Connects 2 different architectures |
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Term
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Definition
- Network Interface Cards
- Contain Media Access Control MAC address |
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Term
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Definition
- Wireless Access Point
- Acts like a switch, router, and hub |
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Term
Network Devices:
Firewalls |
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Definition
- Hardware = faster, or software
- Controls access to network |
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Term
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Definition
- 802.11i defines wireless sec. protocols
- 802.11a @ 5Ghz/54Mbps
- 802.11b @ 2.4Ghz/11Mbps
- 802.11g @ 2.4Ghz/54Mbps, CSMA/DA |
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Term
Media Access Control:
Description |
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Definition
- Unique physical address given to NICs
- distinguishes machines on LAN
- 48 bit binary address in hexadecimal |
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Term
Media Access Control:
Address |
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Definition
- 16 bit hexadecimal address
- 00:B0:A0:5A:E1:B5
- 1st 6 = Block ID
- 2nd 6 = Device ID |
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Term
Media Access Control:
Function |
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Definition
| - ID a computer to the network - Layer 2 |
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Term
| Open System Interconnect (OSI) |
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Definition
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical |
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Term
Open System Interconnect (OSI):
Equipment |
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Definition
(1) Physical: NICs, Hubs, WAPs
(2) Data Link: Switches, bridges
(3) Network: Routers |
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Term
Protocol Types:
Transmission Control Protocol (TCP) |
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Definition
| Error detection b/t client and server |
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Term
Protocol Types:
User Datagram Protocol (UDP) |
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Definition
- Faster/more efficient than TCP
- Less reliable
- Streaming video |
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Term
Protocol Types:
Simple Mail Transfer Protocol (SMTP) |
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Definition
| Send e-mail from client to server |
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Term
Protocol Types:
Hypertext Transfer Protocol (HTTP) |
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Definition
| Transfer info on intranets and WWW |
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Term
Protocol Types:
POP3/IMAP4 |
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Definition
| Post Office Protocol retrieves e-mail |
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Term
Protocol Types:
Internet Control Message Protocol (ICMP) |
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Definition
- Reports success/failure of delivery
- Unreliable
- Associated w/ PING |
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Term
Protocol Types:
Address Resolution Protocol (ARP) |
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Definition
- Obtains MAC address from Host
- Reverse ARP: used when client knows IP address but not MAC address |
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Term
Protocol Types:
Network Time Protocol (NTP) |
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Definition
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Term
Protocol Types:
Lightweight Directory Access Protocol (LDAP) |
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Definition
| Query/Update directory services |
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Term
Protocol Types:
Internet Group Management Protocol (IGMP) |
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Definition
| - Allows for multicasting (teleconferencing) |
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Term
Protocol Types:
Network Address Translation (NAT) |
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Definition
| Making one IP address on internal network appear as a different one |
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Term
Protocol Types:
Simple Network Management Protocol (SNMP) |
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Definition
| Alert conditions needing admin attention |
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Term
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Definition
1. Remote Access
2. Security
3. Authentication |
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Term
Remote Access Protocol:
Virtual Private Network (VPN) |
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Definition
- Allows for secure comms on Public network
- Separate traffic of different user communities |
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Term
Authentication Protocols:
Kerberos |
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Definition
| - Allows secure authentication over non-secure network |
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Term
Internet Protocol (IP) Addresses:
Entities |
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Definition
1. IP Address
2. Subnet Mask
3. Default Gateway |
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Term
Internet Protocol (IP) Addresses:
Classes |
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Definition
A: 1.0.0.0-126.0.0.0/255.0.0.0
B: 128.0.0.0-191.0.0.0/255.255.0.0
C: 192.0.0.0-223.0.0.0/255.255.255.0 |
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Term
Internet Protocol (IP) Addresses:
Subnetting |
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Definition
| To expand the number of networks from one to many |
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Term
Internet Protocol (IP) Addresses:
Schemes |
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Definition
Public - everyone sees it
Private - nonroutable IP addresses |
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Term
Internet Protocol (IP) Addresses:
Private Scheme |
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Definition
A: 10.0.0.0-10.255.255.255
B: 172.16.0.0-172.31.255.255
C: 192.168.0.0-192.168.255.255
Loopback: 127.0.0.1 |
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Term
Internet Protocol (IP) Addresses:
Addressing Methods |
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Definition
Static - manually inputted
Dynamic - assigned upon connection
Automatic - APIPA used when configured to DHCP server when it cannot communicate |
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Term
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Definition
| Internet Connection Sharing |
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Term
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Definition
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Term
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Definition
Well Known: 0-1023
Registered: 1024-49151 |
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Term
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Definition
20/21 - FTP
22 - SSH
25 - SMTP
53 - DNS
80 - HTTP
110 - POP3
123 - NTP
443 - HTTPS |
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