What category cabling should be used in VOIP where throughput of greater than 100Mbps is desired?

What category cabling should be used in VOIP where throughput of greater than 100Mbps is desired?

• CAT-3
• CAT-6
• CAT-5
• CAT-5a 

EXPLANATION

CAT-6 cabling should be used where throughput of greater than 100Mbps is desired.

SOURCE

https://www.centurylink.com/business/help/voip/equipment/phone-and-computer-connection-diagrams.html

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WIth Mobile Networks, what is an umbrella cell?

WIth Mobile Networks, what is an umbrella cell?

• A slang term used for a waterproof mobile phone with folding display.
• Large mobile phone network covering smaller cells.
• Coverage area of a transmitter in a television network
• A cell infected by a virus developed by an international conglomeration. 

 

EXPLANATION

There are five different cell sizes in a GSM (mobile telephone) network: macro, micro, pico, femto and umbrella cells.
Umbrella cells are used to cover shadowed regions of smaller cells and fill in gaps in coverage between those cells.

SOURCE

http://4g5gworld.com/wiki/global-system-mobile-communications-gsm

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drwxr-xr-x 3 root root 73728 Dec 26 08:39 /usr/bin/ <=== This directory file on an ext4 filesystem is listed in long format (ls -ld). The value of the fifth field, 73728, reports the size of what?

drwxr-xr-x 3 root root 73728 Dec 26 08:39 /usr/bin/ <=== This directory file on an ext4 filesystem is listed in long format (ls -ld). The value of the fifth field, 73728, reports the size of what?

• The disk usage, in blocks, of the top level of the directory.
• The disk usage, in blocks, of the directory and all of its subdirectories.
• The exact size of the directory file, in bytes.
• The size in bytes of the total blocks in use by the directory file. [ (bytes/block) * blocks ] 

EXPLANATION

A directory file contains a list of names and corresponding inodes. 
A newly created directory file on an ext4 filesystem will have only 2 entries, dot "." and dot dot ".."  
The size of the new directory file will be 4096 bytes.  As additional entries are made to the directory, the reported size will remain at 4096 until additional bytes are required for the next directory entry.  At that point, additional blocks will be allocated to the directory and the reported directory file size will increase.
As directory entries are removed, the blocks already allocated to the directory file do not decrease, but allocated blocks are freed for future use by new entries in the directory.
https://unix.stackexchange.com/questions/234065/why-size-reporting-for-directories-is-different-than-other-files#
https://superuser.com/questions/142893/why-is-the-size-of-a-directory-always-4096-bytes-in-unix/1428...
http://www.linfo.org/directory.html
Note that when the same "ls" command is used on a regular file, the size field will report the actual file size in bytes, which is stored in the inode.  The " -s " option to "ls" will report allocated blocks, in addition to actual file size.

SOURCE

https://superuser.com/questions/142893/why-is-the-size-of-a-directory-always-4096-bytes-in-unix/142895

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Which of the following is a routing protocol?

Which of the following is a routing protocol?

• NTP
• VLAN
• EIGRP
• NTLMv2 

EXPLANATION

Enhanced Interior Gateway Routing Protocol (EIGRP) is an interior gateway protocol suited for many different topologies and media.
In a well designed network, EIGRP scales well and provides extremely quick convergence times with minimal network traffic.

SOURCE

https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/16406-eigrp-toc.html

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How many pairs are usually in a Cat5 or Cat6 network cable?

How many pairs are usually in a Cat5 or Cat6 network cable?

• 6 pair
• 8 pair
• 2 pair
• 4 pair 

EXPLANATION

Usually cat5 or cat 6 cable is 4 pair package.

SOURCE

https://community.spiceworks.com/topic/258905-in-network-cable-4-pair-of-wire-is-there-only-2-pair-is-used-why-other-2-pair

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What function on VMware allows the manual or automatic distribution of VM's between hosts for a balanced computing resourse?

What function on VMware allows the manual or automatic distribution of VM's between hosts for a balanced computing resourse?

• X-Switch vMotion
• DRS
• HA
• vMotion 

EXPLANATION

VMware DRS (Distributed Resource Scheduler) is a utility that balances computing workloads with available resources in a virtualized environment. The utility is part of a virtualization suite called VMware Infrastructure 3.
With VMware DRS, users define the rules for allocation of physical resources among virtual machines. The utility can be configured for manual or automatic control. Resource pools can be easily added, removed or reorganized. If desired, resource pools can be isolated between different business units. If the workload on one or more virtual machines drastically changes, VMware DRS redistributes the virtual machines among the physical servers. If the overall workload decreases, some of the physical servers can be temporarily powered-down and the workload consolidated.

SOURCE

https://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.wssdk.pg.doc_50%2FPG_Ch13_Resources.15.6.html

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Which of these is NOT an FSMO role?

Which of these is NOT an FSMO role?

• RID Master
• Schema Master
• TCP Master
• PDC Emulator 

 

EXPLANATION

There are 5 FSMO roles:
PDC Emulator (One per domain), RID Master (One per domain), Schema Master (One per forest), Domain Naming Master (One per forest), Infrastructure Master (One per domain)
https://wiki.samba.org/index.php/Flexible_Single-Master_Operations_(FSMO)_Roles

SOURCE

https://wiki.samba.org/index.php/Flexible_Single-Master_Operations_(FSMO)_Roles

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