Linux Ch.12

loopback address

127.0.0.1

classless interdomain routing (CIDR) notation

a notation that is often used to represent an IP address and its subnet mask

octet

a portion of an IP address that represents eight binary bits

Internet Protocol (IP) address

a series of four 8-bit numbers that represent a computer on a network

protocol

a set of rules of communication used between computers on a network

route table

a table of information used to indicate which networks are connected to network interfaces

host name

a user-friendly name assigned to a computer

default gateway

before a computer can use a router, what configuration information must it be provided?

Ping, netstat -i, ifconfig

can be used to check TCP/IP configuration and test network connectivity

ip, route

command used to modify the route table on a Linux computer

ifup eth0

commmand used to activate the NIC aliased as eth0

port

daemons associated with network services listen for network traffic associated with a particular __________

Telnet

does not encrypt all traffic that passes across the network

SSH

encrypts all traffic that passes across the network

/etc/resolv.conf

file used to store TCP/IP addresses of the DNS servers used to resolve host names if no DNS servers are specified within the network configuration file for the NIC

/etc/nsswitch.conf

file which holds the methods to be used and the order in which they will be applied for host name resolution

/etc/sysconfig/network-scripts/ifcfg-eth1

file you would modify to permanently change the TCP/IP address of the first wired NIC on a Fedora20 system

ssh-X, VNC

graphical remote administration technologies

/etc/sysconfig/networkS

line that configures the host name for the computer at boot time can be found here

23

port number associated with telnet

apache (httpd), DNS (named)

stand alone daemons

multicast

the TCP/IP communication destined for a certain group of computers

broadcast

the TCP/IP communication destined for all computers on a network

IP version 4 (IPv4)

the most common version of IP used on the Internet. It uses a 32 bit addressing scheme organized into different classes.

link local

the portion of an IPv6 that refers to a unique computer. It is analogous to the host portion of an IPv4 address

dig hostname nslookup hostname host hostname

to test DNS configuration by resolving a host name to IP address, use these commands

/etc/hosts and DNS

two means which are available to resolve a host name to the appropriate TCP/IP addresses

subnet mask

used to differentiate the host portion from the network portion in a TCP/IP address

routers

used to transfer information from one network to another

putty

windows program often used to connect to a linux server via SSH