Final Exam Flashcards
port number: FTP
20
define: latency
how much time it takes for data packet to travel
port number: POP
109
OSI Model: Data Link datatype
Frames
OSI Model: Physical datatype
Bits
define: attenuation
reduction in the strength of a signal
define: baseline
a snapshot of what is going on in the network
define: CSMA/CA
how network devices respond when two devices encounter a data collision. prevent collisions before they happen
OSI Model: Session datatype
Data
define APIPA
protocol communication names
define: frequency
cycles per second
Single firewall
handles all traffic going to DMZ and internal network.
OSI Model: Network datatype
Segments
protocol: TELNET
command-line interface on a remote host
POTS
standard land-line telephone service, every household
OSI Model: Transport datatype
Data
Authentication
ensures data came from valid source
port number: DHCP
67
protocol: STMP
sending e-mail messages between servers
port number: HTTP
80
RDP
remote desktop protocol to remotely connect to a computer
protocol: POP
retrieve e-mail from a mail server
Logical Topology
how devices appear connected to the user
Environmental monitor
monitors area in a building where sensitive equipment is located
port number: HTTPS
443
OSI Model: Application datatype
Data
port number: TELNET
23
OSI Model: Physical device
Hub
port number: SMTP
`25
define: high availability
a concept in a network optimization, refers to ability to keep network with least downtime
Authorization
verifies an entity has permission
OSI Model: Data link device
Bridge, Switch
dual firewall
The first firewall (the “front-end”) allows traffic destined to the DMZ only. The second firewall (“back-end”) only allows traffic from the DMZ to the internal network.
protocol: FTP
used to transfer computer files from one host to another host over a TCP-based network, such as the Internet.
define: CSMA/CD
how network devices respond when two devices encounter a data collision. deals with transmissions after a collision has occurred
define: Scope
range of IPs
define: noise
unwanted electrical or electromagnetic energy
define: geosynchronous orbit
orbital mass that matches the earth’s sidereal rotation period
Physical Topology
The physical layout of devices on a network.
protocol: DHCP
automatically provides an Internet Protocol (IP) host with its IP address
port number: DNS
53
Bottom to top: OSI Model
Physical, Data Link, Network, Transport, Session, Presentation, Application
define: Leases
The IP address the client receives is only good either until the cliuent is rebooted or logged off
define: Molinya Orbit
cover locations in farther regions
OSI Model: Network device
Router
define: Butt set
tests the connection of a phone
protocol: HTTP
foundation of data communication for the World Wide Web
OSI Model: Presentation datatype
Data
protocol: HTTPS
secure communication over a computer network which is widely used on the Internet
