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31 Cards in this Set

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Before messages can be transmitted through a network interface, the interface
must be placed in the up or active state. what command is used to activate the interface?
# ifconfig Interface [Address] [netmask Netmask] up
what is the default order in resolving host names?
The default order in resolving host names is:
1. BIND/DNS (named)
2. Network Information Service (NIS)
3. Local /etc/hosts file
the inetd daemon reads its configuration information from the /etc/inetd.conf file. how can this file be edited?
The /etc/inetd.conf file can be updated by using the System Management
Interface Tool (SMIT), the System Resource Controller (SRC), or by editing the
/etc/inetd.conf.
what is the ifconfig command?
The ifconfig command can allow you to configure and modify properties of
network interfaces directly, without the use of SMIT.
why should you NOT use the command startsrc -g tcpip?
It will start all subsystems defined in the ODM for the tcpip group, which
includes both routed and gated.
what is the /etc/services file?
The /etc/services file contains information about the known services used in the
DARPA Internet network by inetd. Each service listed in /etc/services runs on a
specific port number for communications, in a specific format, such as TCP or
UDP.
what is the securetcpip command for?
The securetcpip command provides enhanced security for the network on a
host. It performs the following tasks:
Disables the nontrusted commands and daemons: rcp, rlogin, rlogind, rsh,
rshd, tftp, and tftpd.
Adds a TCP/IP security stanza to the /etc/security/config file.
what daemons will the script /etc/tcp.clean stop?
The script /etc/tcp.clean can be used to stop TCP/IP daemons. It will stop the
following daemons and remove the /etc/locks/lpd TCP/IP lock files:
 ndpd-host
 lpd
routed
 gated
 sendmail
 inetd
 named
 timed
 rwhod
 iptrace
 snmpd
 rshd
 rlogind
 telnetd
 syslogd
what is the command lsdev -Cc if used for?
This will produce a simple list of all interfaces on the system, whether they are
being actively used by the system or not.
how can you stop tcp/ip from starting during IPL?
remove the rc.tcpip entry in /etc/inittab
what is smit route or smit mkroute used for?
For those systems that need to access a private network, use the SMIT fast path
smit route or smit mkroute to add a route to the private network through the
gateway between two networks.
how do you setup anonymous FTP on a server running AIX 5L Version 5.1?
run the script:
# /usr/samples/tcpip/anon.ftp
what is the portmap daemon?
The portmap daemon converts remote procedure call (RPC) program numbers
into Internet port numbers.
what is the script /etc/tcp.clean used for?
The script /etc/tcp.clean can be used to stop TCP/IP daemons.
how can the default order for resolving hosts be overwritten?
The default order can be overwritten by creating the configuration file,
/etc/netsvc.conf and specifying the desired order. Both the default and
/etc/netsvc.conf can be overwritten with the environment variable NSORDER.
the script /etc/tcp.clean does not stop the portmap and nfsd daemons. how can these deamons be stopped?
If you want to stop the portmap and the nfsd daemons, use the stopsrc -s
portmap and the stopsrc -s nfsd commands.
To convert numbers to and from binary format, what command can you use?
you can use the bc command. To
make the conversion of value 195 to binary format, enter:
# bc
obase=2
195
11000011
To convert the binary number 11001100 to a decimal format, enter:
# bc
ibase=2
11001100
204
what script can be used to start tcp/ip daemons?
The /etc/rc.tcpip script can be used to restart TCP/IP daemons.
what ifconfig command is used to delete an address from a network interface?
# ifconfig Interface [Address] [netmask Netmask] delete
how do you determine the MTU (maximum transmission unit) size variable for an interface?
# lsattr -El Interface
what is the inetd daemon?
The /usr/sbin/inetd daemon provides Internet service management for a network.
This daemon reduces system load by invoking other daemons only when they
are needed and by providing several simple Internet services internally without
invoking other daemons.
what is the $HOME/.netrc file?
The $HOME/.netrc file contains information used by the automatic login feature
of the rexec and ftp commands. It is a hidden file in a user's home directory and
must be owned either by the user executing the command or by the root user.
what is the purpose of the lssrc Command
Gets the status of a subsystem, a group of subsystems, or a subserver.
what is the /etc/resolv.conf file?
The /etc/resolv.conf file defines Domain Name Protocol (DOMAIN) name-server
information for local resolver routines.
what is the nslookup command used for?
The nslookup command queries domain name servers for information about
various hosts and domains.
how would you enable ip forwarding?
no -o ipforwarding=1
how would you bind an alias to a network interface?
To bind an alias to a network interface, run the command:
# ifconfig Interface Address [netmask Netmask] alias
how can the MTU size be adjusted?
The ifconfig command can adjust the MTU size for a network interface. To
change the MTU size, run the command:
# ifconfig Interface mtu Value
To check
attributes of any interface what commands can be used?
use the ifconfig or lsattr
what is the /etc/hosts.equiv file?
The /etc/hosts.equiv file, along with any local $HOME/.rhosts files, defines the
hosts (computers on a network) and user accounts that can invoke remote
commands on a local host without supplying a password.
without server applications started, the server cannot be rlogin or ftp to. can the server still ping and telnet and ftp other hosts?
yes