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Flashcards in NETWORK+ Terms H's Deck (23):
1

A person who carries out
attacks on a computer software program.
See also cracker.

hacker

2

A connection in which
data is transmitted in both directions
but not simultaneously.
Compare with full duplex.

half duplex

3

The initial communication
between two data communication
devices, during which they
agree on protocol and transfer rules
for the session.

handshake

4

The hardwareencoded
MAC address burned into
every NIC.

hardware address

5

A device
plugged into an interface for the
purposes of simulating a network
connection. This enables the interface
to be tested as if it is operating
while connected.

hardware loopback

6

An ISO developed bitoriented
synchronous data link layer
protocol used for point-to-point or
point-to-multipoint connections.

HDLC (High-Level Data Link
Control)

7

The means by which routing
protocols determine the shortest
way to reach a given destination.
Each router constitutes one hop. If
a router is four hops away from
another router, for example, three
routers, or hops, exist between the
first router and the destination. In
some cases, the final step is also
counted as a hop.

hop

8

Ties the
telecommunication room to the end
user. Specifically, the horizontal
cabling extends from the telecommunications
outlet, or network outlet
with RJ-45 connectors, at the
client end. It includes all cable from
that outlet to the telecommunication
room to the horizontal crossconnect.
The term horizontal crossconnect
refers to the distribution
point for the horizontal cable.

horizontal cross-connect

9

Typically refers to any device
on the network that has been
assigned an IP address.

host

10

A firewall system
installed and configured on and
used for an individual host. Contrast
to a network firewall that provides
firewall services for all network
nodes.

host firewall

11

An identifier used to
uniquely identify a client or
resource on a network.

host ID

12

A name assigned to a
system for the purposes of identifying
it on the network in a more
user-friendly manner than by the
network address.

hostname

13

A text file that contains
hostname-to-IP address mappings.
All commonly used platforms
accommodate static name resolution
using the HOSTS file.

HOSTS file

14

A disaster recovery term
used to describe an alternative network
site that can be immediately
functional in the event of a disaster
at the primary site.

hot site

15

In a RAID configuration,
a drive that sits idle until
another drive in the RAID array
fails, at which point the hot spare
takes over the role of the failed
drive.

hot spare

16

An area in which an
access point provides public wireless
broadband network services to
mobile visitors through a WLAN.
Hotspots are often located in heavily
populated places such as airports,
hotels, and coffee shops.

hotspot

17

The removal and
replacement of a component in a
system while the power is still on
and the system is functioning.

hot swap

18

A Cisco proprietary protocol
used for establishing redundant
gateways.

HSRP (Hot Standby Router
Protocol)

19

A protocol used by web browsers to
transfer pages, links, and graphics
from the remote node to the user’s
computer.

HTTP (Hypertext Transfer Protocol)

20

A protocol that performs
the same function as HTTP but
does so over an encrypted link,
ensuring the confidentiality of any
data that is uploaded or downloaded.
Also referred to as S-HTTP.

HTTPS (Hypertext Transfer Protocol
Secure)

21

A hardware device that acts as
a connection point on a network
that uses twisted-pair cable. Also
known as a concentrator or a multiport
repeater.

hub

22

A Windows-based
communications program that
enables users to establish host/shell
access to a remote system.

HyperTerminal

23

Equivalent to cycles per
second, hertz is the unit of frequency
defined as the number of
cycles per second of a periodic
phenomenon.

Hz (Hertz)