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31 Cards in this Set
- Front
- Back
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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
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what is the default order in resolving host names?
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The default order in resolving host names is:
1. BIND/DNS (named) 2. Network Information Service (NIS) 3. Local /etc/hosts file |
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the inetd daemon reads its configuration information from the /etc/inetd.conf file. how can this file be edited?
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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. |
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what is the ifconfig command?
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The ifconfig command can allow you to configure and modify properties of
network interfaces directly, without the use of SMIT. |
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why should you NOT use the command startsrc -g tcpip?
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It will start all subsystems defined in the ODM for the tcpip group, which
includes both routed and gated. |
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what is the /etc/services file?
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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. |
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what is the securetcpip command for?
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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. |
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what daemons will the script /etc/tcp.clean stop?
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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 |
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what is the command lsdev -Cc if used for?
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This will produce a simple list of all interfaces on the system, whether they are
being actively used by the system or not. |
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how can you stop tcp/ip from starting during IPL?
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remove the rc.tcpip entry in /etc/inittab
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what is smit route or smit mkroute used for?
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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. |
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how do you setup anonymous FTP on a server running AIX 5L Version 5.1?
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run the script:
# /usr/samples/tcpip/anon.ftp |
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what is the portmap daemon?
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The portmap daemon converts remote procedure call (RPC) program numbers
into Internet port numbers. |
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what is the script /etc/tcp.clean used for?
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The script /etc/tcp.clean can be used to stop TCP/IP daemons.
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how can the default order for resolving hosts be overwritten?
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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. |
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the script /etc/tcp.clean does not stop the portmap and nfsd daemons. how can these deamons be stopped?
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If you want to stop the portmap and the nfsd daemons, use the stopsrc -s
portmap and the stopsrc -s nfsd commands. |
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To convert numbers to and from binary format, what command can you use?
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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 |
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what script can be used to start tcp/ip daemons?
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The /etc/rc.tcpip script can be used to restart TCP/IP daemons.
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what ifconfig command is used to delete an address from a network interface?
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# ifconfig Interface [Address] [netmask Netmask] delete
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how do you determine the MTU (maximum transmission unit) size variable for an interface?
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# lsattr -El Interface
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what is the inetd daemon?
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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. |
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what is the $HOME/.netrc file?
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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. |
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what is the purpose of the lssrc Command
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Gets the status of a subsystem, a group of subsystems, or a subserver.
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what is the /etc/resolv.conf file?
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The /etc/resolv.conf file defines Domain Name Protocol (DOMAIN) name-server
information for local resolver routines. |
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what is the nslookup command used for?
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The nslookup command queries domain name servers for information about
various hosts and domains. |
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how would you enable ip forwarding?
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no -o ipforwarding=1
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how would you bind an alias to a network interface?
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To bind an alias to a network interface, run the command:
# ifconfig Interface Address [netmask Netmask] alias |
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how can the MTU size be adjusted?
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The ifconfig command can adjust the MTU size for a network interface. To
change the MTU size, run the command: # ifconfig Interface mtu Value |
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To check
attributes of any interface what commands can be used? |
use the ifconfig or lsattr
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what is the /etc/hosts.equiv file?
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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. |
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without server applications started, the server cannot be rlogin or ftp to. can the server still ping and telnet and ftp other hosts?
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yes
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