Comptia Network+ Exam Flashcards
Star Topology
- Most common- Network topology which requires each computer to connect to a central point such as a hub or switch.- Each computer has own cable connection- Has single point of failure
Bus Topology
- Each devise is connected to a single cable - uses BNC or T connectors- cheap and easy to implement
Ring Topology
- Network topology which connects one computer to another in a continuous loop- every computer has 2 neighbors- easy to install and troubleshoot
Mesh Topology
- Network topology in which all host machines are connected to one another- expensive- mainly used on WAN (Internet)- high redundancy level
Hybrid Topology
- Network topology which combines the use of multiple topology methods.- star bus and star ring are most common
Point to Point Topology
Which topology consists of a permanent link between two endpoints? It is a very popular WAN topology.
Client Server Topology
- All data on one machine- Computers can access all the data on that one machine
Point to MultiPoint Topology
A network topology that consists of multiple devices connecting to single device in order to communicate.- commonly used in wireless outdoor networks
RJ-11 Connector
- telephone jack- used to connect to modems on a computer- locking tab- resembles RJ-45 but smaller
RJ-45
- most common- connect computers to LAN networks- twisted pair cabling
RJ-48c
- used with shielded twisted pair- used with T1- wired differently that RJ-45
UTP coupler
used to connect UTP network cables to each others
BNC connector
- common type of RF connector- Bayonet style coaxial cabling connector generally made of nickel plated brass
BNC coupler
- used to connector together 2 coaxial cables with BNC connectors
Fiber coupler
- connect to fiber optic connectors- have to be the same type
Fiber adaptors
used to join to different fiber optic connectors tougher
F-Type Connector
A connector used to terminate coaxial cable used for transmitting television and broadband cable signals.- used by cable providers
USB connector
Plugs into USB port to transfer data between computer and external device
IEEE 1394
-Firewire- recognized by D shape- attaching peripheral devices such as cameras and printers- video and multimedia devices
MT-RJ
- fiber optic connector- latched push pull connector-small form factor for high packed density- smallest can send and receive fiber at the same time
ST connector
- fiber optic connector- straight tip- single mode fire optic cable-half twisted bayonet type of lock
LC connector
- local connector- fiber optic - commonly used between floors on a building- latch like RJ-11
SC connector
- push pull- fiber optic- common used between floors
RS-232
- send data one bit at a time- have a D shape connector- A standard port recommended by the Electronics Industry Association for serial devices.
APC vs UPC connectors
UPC - light reflects back in opposite direction. Makes signal lossAPC - angle of the tip. Light doesn't reflect back
Plenum
space between a suspended ceiling and the floor assembly above- more prone to fires- must be fire resistant and no toxic fumes
Ethernet over HDMI
-IEEE 1901-2013 Standard-HDMI 1.4 specification adds networking to HDMI cable- 100 mb/sec
Ethernet over powerline
ability of ethernet networking over power- IEEE 1901 standard-need power line network adaptors
10 Base-T
Cable Standard- 10 Mbps- Baseband Trasnmission- Twisted Piar cable
10 Base-2
Thin EthernetCoaxial Cable10 Mbps200 meters
100 Base-T
100 mbpsUTP cat 5 or higher100 meters"Fast Ethernet"
100 Base-FX
100 mbpsFiber optic cable400 meters (half duplex)2 Kilometers (full duplex)
1000 Base-T
1000 mbpsUTP cat. 5 or higher100 meters4 bidirectional wires
1000 Base-TX
1000 mbpseasier set up 2 unidirectional pairs of wiresfailure in commercial implementation
10G base t
10 GbpsSTP and UTP cabling100 meters (cat 6a)55 meters (cat 6)
STP and UTP
shielded and unshielded twisted pair cabling
10G Base- SR
short rangemultimode fiber specification300 meters
10G base ER
40 kilometers using single mode fiber
10 G base SW
specifically to operate over SONET
Firewall
-software or hardware-prevent unauthorized access-blocks unwanted and permits trafic
ACL
access control list- list of rules on what can access network
Implicit Deny
firewall only allow traffic that ACL allows
Host Based FIrewall
-software firewall-installed on compter-protects that computer only
Network Based Fire
-combination of hardware and software-operates on the network layer- protects entire network
Stateful
Monitors all the connection and data steams that pass through-keeps a record
Stateless
- does not do a throrough job or inspecting packets-uses an ACL to allow or deny traffic-only looks at header of packet- does not keep record
Content Filtering
- common use in email-based on content and not source-used to filter spam
Signature identification
used to detect virus with well known behavior patters
IDS/IPS
intrusion detection or Prevention system- alert and prevent a network from outside attacks- motors traffic looking for suspicious patterns
568 Wiring Standard
developed by TIA/EIAdefines the rules on how twisted pair cables should be wired to RJ-45 connectors
568A
white greengreenwhite orangebluewhite blueorangewhite brownbrown
568B
white orangeorangewhite green bluewhite bluegreenwhite brownbrown
Straight Cable
wired using the same standard
Cross-over cable
wired using 2 different standard
Rollover cable
both ends are wired completely opposite of each other
loopback cable
-testing purposes-make a computer think its connected to a network- connect pin 1 to pin 3 and pin 2 to pin 6
UTP cable
untwisted twisted pair- most common- prevents electromagnetic interference (crosstalk)- mainly used on LAN- greater number of twist, better prevention
STP
shelled twisted pair- shield prevents layer of protection against electromagnetic interference- metal shieldeing
coaxial cable
used by cable providers- back bone for netowrks
RG-6
coaxial cablelong distance -cable television and internet connections
RG-59
coaxial cableshort distances- HD and high quality videocoaxial cable
SMF
single mode fiber optic cable- allows light to enter only at a single angle
MMF
-fiber optic cable-light reflects off the walls of cable- made for short distnaces
media converter
allows you to convert to different types of media
Docsis Modem
Data over cable service interface specification- modem: handle incoming and outgoing data signals10 Gig downstream1 gig upstream
Hub
not intelligent: no filter data or routing.-all devices on hub see data packetPassive: does not require powerActive: does require power
Switch
smarter than hub-data directed only to intended port-operate at layer 2
multilayer switch
operate at layer 2 and 3 of OSI model- interprets layer 3 data similar to a router-
Content Switch
can operate at layer 4 through 7 of OSI model
PoE
power over ethernet- devices get their electrical power from the ethernet cable
Spanning Tree Portocol
allows for fault tolerance and prevents unnecessary traffic loops on the network- allow switches to talk to eachother to find if loops are occuring
Bridges
divide network into separate collision domains- reduce any unnecessary traffic- filters data based on mac adresss
Router
device that forwards or routs data packets based on their IP address
Gateway
Device that joins 2 networks together- does not change the data, only the format of the data
CSU/DSU
Channel service unit/data interface card-converts data from a LAN to a WAN
NICs
used to connect a computer to a network- convert serial data to parallel data- has mac address
Transceiver
device that has both a transmitter and receiver in the same package- any devise that receives data, converts it, then transmits the data to another location
WAP
wireless access point- Designed to provide secure Web services to handheld wireless devices such as smart phones.
Modem
allows data to transfer over regular telephone lines- converts analog data into digital data- 56 kbps