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chpt 10 terms

chpt 10 vocabulary

QuestionAnswer
whois utility that allows you to query ICANN's DNS registration database and find info about the domain
tracepath version of the traceroute utility found on some Linux
traceroute TCI/IP utility that uses ICMP to trace the path from one network node to another,identifying all hopss between the two nodes
traceroute useful for determining router or subnet connectivity problems
supernet mask a 32 bit number that,when combined with a devices IP address,indicates the kind of supernet to which the device belongs
static network address translation a type of address translation in which each private IP address is correlated with its own Internet recognized IP address
simple mail transfer protocol application layer tcp/ip subprotocol responsible for moving messages from one email server to another
route a utility for viewing or modifying a hosts routing table
public network a network that any user can access with no restrictions.internet is the most familiar example
private network a network whose access is restricted to only clients with proper credentials
post office protocol version 3 most commonly used version of pop
post office protocol an application layer protocolused to retreive messages from a mail server.
pop3 when a client retreives mail,messages previously stored on the mail server are downloaded to the clients workstation and then deleted from the server
pathping a command line utility that combines the functionality of the tracert and ping commands
port address translation a form of addressing translation that uses TCP port numbers to distinguish each clients transmission,thus allowing multiple clients to share a limited number of internet-recognized IP addresses
nslookup a tcp/ip utility that allows you to look up the DNS host name of a network node by specifying its IP address or vice-versa
nslookup useful for verifying that a host is configured correctly and for troubleshooting DNS resolution problems
netstat a tcp/ip troubleshooting utility that displays statistics and the state of the current tcp/ip connections.displays ports,which can signal whether services are using the correct path
netbios a protocol that runs in the session and transport layers of the osi model and associates netbios names with workstations
netbios is not routable because it does not contain network layer information
nbstat a tcp/ip troubleshooting utility that provides information about netbios names and their addresses.
network address translation a technique in which ip addresses used on a private network are assigned a public address by a gateway when accessing a public network
my trace route mtr a route discovery and analysis utility that comes with unix and linux operating systems
mtr combines the functions of the ping and traceroute commands and delivers an easily readable chart as its output
multipurpose internet mail extension a standard for encoding and interpreting binary files,images,video, and non ascii character sets with an email message
internet message access protocol a mail retreival protocol that improves on the shortcomings of pop.
imap it allows users to store messages on the server rather then having to download them to their local machine
internet connection sharing host on a network using microsoft ,the computer whose internet connection other computers share
internet connection sharing a service that allows one computer,the ics host,to share its internet connection with other computers on the same network
hostname a tcp/ip utility used to show or modify a clients host name
host a tcp/ip utility that at its simplest returns either the ip address of a host if its host name is specified or its host name if its ip address is specified
extended network prefix the combination of an ip's address's network id and subnet information
extended network prefix a device can determine the subnet to which an address belongs
dynamic network address translation a type of address translation in which a limited pool of internet valid ip addresses is shared by multiple private network hhosts
domain information groper a tcp/ip utillty that queries the dns database and provides information about a host given its ip address or vice versa.
dig similiar to the nslookup utility,but provides more information,even in its simplest form,than nslookup can
default gateway first interprets a devices outbound request and then interprets its inbound requests to and from other subnets
core gateway operates on the internets backbone
classful addressing convention that adheres to network class distinction
class A first 8 bits
class B first 16 bits
class c first 24 bits
cidr notation a method of denoting network id's and their subnet boundaries
cidr block the number of bits used for an extended prefix
cidr notation slash
classless interdomain routing an ip addressing and subnetting method
cidr network and host information is manipulated without adhering to the limitations imposed by traditional network class distinctions
cidr supernetting
route command allows you to view a hosts routing table and add,delete or modify preferred routes
nslookup utility more flexible version of the host command
ifconfig utility that establishes and allows management of the tcp/ip settings on a unix or linux system
nat gateways assign transmissions valid internet ip addresses to be shared by multiple clients
dnat allows one or more internet recognized ip addresses to be shared by multiple clients
snat establishes a one to one correlation between each private ip address and internet recognized ip addresses
subnet mask provides clues about the location of network information in an ip address.
subnet a network simpler troubleshooting,enhanced network security,improved performance,and easier network management
subnetting seperates one network or segment into multiple logically defined segments
-c count mtr
-r generate a report mtr
-n display only ip addresses and not host names mtr
-i specify a period of time mtr
-d not resolve ip addresses to host names tracert
-h maximum number of hops tracert
-w timeout period for responses wait time tracert
-a name of the machines table given its netbios name nbstat
-A machines name table given its ip address nbstat
-r useful for determining whether a workstation is resolving names properly or for determining whether wins is operating properly nbstat
-s list of all current netbios sessions for a machine.attempts to resolve ip addresses to netbios names in the listing nbstat
-a list of all available tcp and udp connections netstat
-e display details about all the packets that have been sent over a network connection netstat
-n lists currently connected hosts according to their port and ip address netstat
-p allows you to specify what tyhpe of protocol statistics to list netstat
-r list of routing table information netstat
-s statistics about each packet transmitted by a host,seperated according to protocol type netstat
-a applies the command to all interfaces on the device ifconfig unix linux
down marks the interface as unavailable to the network ifconfig unix linux
up reinitializes the interface after it has been taken down to make it available to the network ifconfig linux unix
/renew renews dhcp assigned addresses for all of the devices network interfaces ipconfig
/release releases dhcp assigned addressesw for all of the devices networks ipconfig
/all displays complete tcp/ip configuration information for each network interface on that device ipconfig
/? list of switches available for use with the ipconfig command
Created by: cgeaski