Oracle 1z0-820 Exam Practice Questions (P. 4)
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Question #16
You have been tasked with creating a dedicated virtual network between two local zones within a single system. In order to isolate the network traffic from other zones on that system.
To accomplish this, you will create__________.
To accomplish this, you will create__________.
- AAn ether stub
- BA virtual router
- CA virtual switch
- DA virtual bridge.
- EA virtual network interface
- FNothing because a virtual switch is automatically created then the virtual network interfaces are created.
Correct Answer:
A
Etherstubs are pseudo ethernet NICs which are managed by the system administrator. You can create VNICs over etherstubs instead of over physical links.
VNICs over an etherstub become independent of the physical NICs in the system. With etherstubs, you can construct a private virtual network that is isolated both from the other virtual networks in the system and from the external network. For example, you want to create a network environment whose access is limited only to your company developers than to the network at large. Etherstubs can be used to create such an environment.
Note: Oracle Solaris 11 introduces a new and powerful network stack architecture which includes:
* Networking virtualization with virtual network interface cards (VNICs) and virtual switching (etherstubs)
* Tight integration with zones
* Network resource management - efficient and easy to manage integrated quality of service (QoS) to enforce bandwidth limit on VNICs and traffic flows
We will be examini -
Reference: Oracle Solaris Administration: Network Interfaces and Network Virtualization, Configuring Components of Network Virtualization in Oracle Solaris
A
Etherstubs are pseudo ethernet NICs which are managed by the system administrator. You can create VNICs over etherstubs instead of over physical links.
VNICs over an etherstub become independent of the physical NICs in the system. With etherstubs, you can construct a private virtual network that is isolated both from the other virtual networks in the system and from the external network. For example, you want to create a network environment whose access is limited only to your company developers than to the network at large. Etherstubs can be used to create such an environment.
Note: Oracle Solaris 11 introduces a new and powerful network stack architecture which includes:
* Networking virtualization with virtual network interface cards (VNICs) and virtual switching (etherstubs)
* Tight integration with zones
* Network resource management - efficient and easy to manage integrated quality of service (QoS) to enforce bandwidth limit on VNICs and traffic flows
We will be examini -
Reference: Oracle Solaris Administration: Network Interfaces and Network Virtualization, Configuring Components of Network Virtualization in Oracle Solaris
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Question #17
Which three options describe the purpose of the zonep2vchk command?
- AUsed on a Solaris 10 global zone to access the system for problems before migrating that system to a Solaris 10 branded zone.
- BUsed to access a Solaris 10 global zone for problems before migrating that zone to a Solaris 11 global zone
- CUsed to create zonecfg template for a Solaris 10 global zone that that will be migrated to a solaris10 branded zone.
- DUsed to migrate an Oracle Solaris 11 global zone to a non-global zone.
- EUsed to migrate a Solaris 10 global zone to a non-global zone on the same server; the non-global zone can then be migrated to a Solaris 11 server as a Solaris10 branded zone.
Correct Answer:
CDE
zonep2vchk
- check a global zone's configuration for physical to virtual migration into non-global zone
The zonep2vchk utility is used to evaluate a global zone's configuration before the process of physical-to-virtual (p2v) migration into a non-global zone.
The p2v process involves archiving a global zone (source), and then installing a non-global zone (target) using that archive zonep2vchk serves two functions. First, it can be used to report issues on the source which might prevent a successful p2v migration. Second, it can output a template zonecfg, which can be used to assist in configuring the non-global zone target. zonep2vchk can be executed on a Solaris 10 or later global zone. To execute on Solaris 10, copy the zonep2vchkutility to the Solaris 10 source global zone.
When run on Solaris 10, a target release of S11 can be specified, which will check for p2v into a Solaris 10 Branded zone.
Reference: man zonep2vchk
CDE
zonep2vchk
- check a global zone's configuration for physical to virtual migration into non-global zone
The zonep2vchk utility is used to evaluate a global zone's configuration before the process of physical-to-virtual (p2v) migration into a non-global zone.
The p2v process involves archiving a global zone (source), and then installing a non-global zone (target) using that archive zonep2vchk serves two functions. First, it can be used to report issues on the source which might prevent a successful p2v migration. Second, it can output a template zonecfg, which can be used to assist in configuring the non-global zone target. zonep2vchk can be executed on a Solaris 10 or later global zone. To execute on Solaris 10, copy the zonep2vchkutility to the Solaris 10 source global zone.
When run on Solaris 10, a target release of S11 can be specified, which will check for p2v into a Solaris 10 Branded zone.
Reference: man zonep2vchk
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Question #18
Your are troubleshooting network throughput on your server.
To confirm that the load balancing among aggregated links is functioning properly, you want to examine the traffic statistics on the links comprising the aggregation.
The correct command is ___________.
To confirm that the load balancing among aggregated links is functioning properly, you want to examine the traffic statistics on the links comprising the aggregation.
The correct command is ___________.
- Adlstat - aggr
- Bdlstat show-aggr
- Cdlstat show-link -r
- Ddlstat show-link -aggr
- Edlstat show-phys -aggr
Correct Answer:
B
dlstat show-aggr [-r | -t] [-i interval] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display per-port statistics for an aggregation.
Incorrect answers:
dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display statistics for a link.
B
dlstat show-aggr [-r | -t] [-i interval] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display per-port statistics for an aggregation.
Incorrect answers:
dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[,...]] [-u R|K|M|G|T|P] [link]
Display statistics for a link.
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Question #19
You have set up the task.max-lwps resource control on your Solaris 11 system.
Which option describes how to configure the system so that syslogd notifies you when the resources control threshold value for the task.max-lwps resource has been exceeded?
Which option describes how to configure the system so that syslogd notifies you when the resources control threshold value for the task.max-lwps resource has been exceeded?
- AUse the rctladm command to enable the global action on the task.max-lwpa resource control.
- BModify the /etc/syslog.conf file to activate system logging of all violations of task.max-lwps and then refresh then svc: /system/system-log:default service.
- CActivate system logging of all violations of task.max-lwpp in the /etc/rctldm.conf file and then execute the rctladm-u command.
- DUse the prct1 command to set the logging of all resource control violations at the time the task.max-lwps resource control is being setup.
- EUse the setrct1 command to set the logging of all resource control violations for the task.max-lwps resource control.
Correct Answer:
A
rctladm - display and/or modify global state of system
resource controls
The following command activates system logging of all viola-
tions of task.max-lwps.
# rctladm -e syslog task.max-lwps
#
Reference: man rctladm
A
rctladm - display and/or modify global state of system
resource controls
The following command activates system logging of all viola-
tions of task.max-lwps.
# rctladm -e syslog task.max-lwps
#
Reference: man rctladm
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Question #20
You are troubleshooting the failure of a computer to mount an NFS file system hosted by a server (hostname mars) in the local area network.
Select the three commands that will enable you to identify the problem.
Select the three commands that will enable you to identify the problem.
- Aping - s mars
- Bcat /etc/vfstabMost Voted
- Ccat /etc/dfs/dfstab
- Dsharemgr show -v
- Eshowmount -e marsMost Voted
- Frpcinfo -s mars | egrep ‘nfs|mountd’Most Voted
Correct Answer:
AEF
mount: mount-point /DS9 does not exist.
To solve the mount point error condition, check that the mount point exists on the client. Check the spelling of the mount point on the command line or in the /etc/ vfstab file (B) on the client, or comment out the entry and reboot the system.
Note: The /etc/vfstab file lists all the file systems to be automatically mounted at system boot time, with the exception of the /etc/mnttab and /var/run file systems.
E: showmount -
This command displays all clients that have remotely mounted file systems that are shared from an NFS server, or only the file systems that are mounted by clients, or the shared file systems with the client access information. The command syntax is: showmount [ -ade ] [ hostname ] where -a prints a list of all the remote mounts (each entry includes the client name and the directory), -d prints a list of the directories that are remotely mounted by clients, -e prints a list of the files shared (or exported), and hostname selects the NFS server to gather the information from. If hostname is not specified the local host is queried.
F: * mountd Daemon -
This daemon handles file-system mount requests from remote systems and provides access control. The mountd daemon checks /etc/dfs/sharetab to determine which file systems are available for remote mounting and which systems are allowed to do the remote mounting.
* Commands for Troubleshooting NFS Problems
These commands can be useful when troubleshooting NFS problems. rpcinfo Command
This command generates information about the RPC service that is running on a system.
Incorrect answers:
A: not a network connectivity problem
D: The sharemgr command configures share groups and the shares contained within them.
Reference: man showmount
AEF
mount: mount-point /DS9 does not exist.
To solve the mount point error condition, check that the mount point exists on the client. Check the spelling of the mount point on the command line or in the /etc/ vfstab file (B) on the client, or comment out the entry and reboot the system.
Note: The /etc/vfstab file lists all the file systems to be automatically mounted at system boot time, with the exception of the /etc/mnttab and /var/run file systems.
E: showmount -
This command displays all clients that have remotely mounted file systems that are shared from an NFS server, or only the file systems that are mounted by clients, or the shared file systems with the client access information. The command syntax is: showmount [ -ade ] [ hostname ] where -a prints a list of all the remote mounts (each entry includes the client name and the directory), -d prints a list of the directories that are remotely mounted by clients, -e prints a list of the files shared (or exported), and hostname selects the NFS server to gather the information from. If hostname is not specified the local host is queried.
F: * mountd Daemon -
This daemon handles file-system mount requests from remote systems and provides access control. The mountd daemon checks /etc/dfs/sharetab to determine which file systems are available for remote mounting and which systems are allowed to do the remote mounting.
* Commands for Troubleshooting NFS Problems
These commands can be useful when troubleshooting NFS problems. rpcinfo Command
This command generates information about the RPC service that is running on a system.
Incorrect answers:
A: not a network connectivity problem
D: The sharemgr command configures share groups and the shares contained within them.
Reference: man showmount
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