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what is DNS used for
maps ip to host name
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how do you troubleshoot nfs mounts
- showmount -e <host>
- ping <host>
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daemons for nfs
lockd, statd, nfsd, mountd, vladd
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what does the nsswitch.conf file do?
tells unix how to resolve passwds, hosts, etc
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how do i find out if my interfaces are set for full duplex or not?
- solaris - ndd -get /dev/hme ? (adv_100fdx_cap; adv_100hdx_cap; adv_autoneg_cap)
- linux - mii-tool
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what command is used to find a linux machine's ip information
ifconfig -a
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how do i set a default route?
route add default <ip> <metric>
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how do i verify my default route?
netstat -rn
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difference between udp and tcp
- udp - send and forget, unreliable
- tcp - 3 way handshake, reliable
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7 layers of the OSI model
- application
- presentation
- session
- transport
- network
- data link layer
- physical
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what's a vlan?
breaks down traffic so it only speaks across certain ports
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difference between a hub and a switch
collision domains
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set an ip address on a cisco switch
Config-if# ip address 122.2.3.2 255.255.255.0
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verify the cisco switch ip
Show ip - ip config of switch
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dump the config file
show running-config
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What's a computer account and why would i want one?
allows the computer to authenticate to the domain
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how would i find the ip address of a windows machine from the command line?
ipconfig /all
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what's the $ after a share mean?
it's a hidden, administrative share
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what's netbios?
a NON-routable LAN protocol used in ethernet and token ring
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what's WINS?
creates a computer name -> ip mapping
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Difference between native and mixed mode domain model?
mixed allows pre win2k machines to authenticate
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What's the SGA and what's it used for?
system global area - used to transfer data and information between clients and the database
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What's the difference between a hot backup and a cold backup?
hot is done during normal operation without shutting down
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What's a pst file?
mail files used for microsoft outlook email.
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What's NDMP?
open solution backup protocol
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What port does NDMP use?
10000
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What's a lun? How is it different from a regular disk?
it's an "object" on the disk(s). it can encompass multiple disks
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What's RAID 4?
Single parity, multiple data
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How about RAID 5?
Parity across disks (our diagonal parity)
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what is RAID 1?
Mirroring
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for veritas, what are volumes made out of?
- Volumes are made up of plexes
- Plexes are made up of subdisks
- Subdisks are made up of VM disks
- VM disks are made up of real disks
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What are three common daemons in veritas?
- vxiod - veritas io manager (managers reads and writes to volumes
- vxconfigd - vx object config manager
- vxrelocd - vx hot swap manager
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Where's the veritas config file?
trick question - there isn't on! vxconfigd watches all.....
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