Answer:
D
Explanation:
A. Polarization is simple for most antennas to determine. It is only on the same level as the antenna components. A vertically polarised antenna (that is one with vertical elements) is better received and a horizontal antenna is equally provided with horizontally polarised signals.
B. The left-hand circular polarization is named if the electric chambers vector rotates counter-clockwise as far as they are from the antenna.
The right-hand circular polarisation is named as the electric field vector rotates counter-clockwise as far as it gets from the antenna.
It then goes without stating the polarisation on the right hand is orthogonal to the left.
C. signals of the same frequency can be transmitted together in an non-interfering manner as long as their polarizations are orthogonal to one another. This too a correct statement.
Answer:
PBX system.
Explanation:
PBX is an acronym for private branch exchange. It is a private telephone network service that allows users to communicate by making or taking inbound and outbound calls using a gateway, voice mail, transfer calls, call queues and recording.
In an office, employees having a PBX telephone can call other employees in the same office regarding official work.
The callers have to dial a particular extension number so that the intended receiver gets the call.
Example of an extension number is 111-5001 and 111-5002, with a central number as 111-5000.
Hence, the telephone network used in this office is the PBX system.
The above command allows any interface to learn its IP address dynamically by using the DHCP protocol. It is best suited for Ethernet interfaces that dynamically connect to an ISP.
It also in the majority of cases configures the switch to acquire an IP from a DHCP server. Once one inputs this command, it contains a discover message that includes the MAC address of the ethernet interface and the default hostname of the router.
Answer:
Differences between arrays and linked list are as following:-
- Arrays store elements in contiguous memory location while the linked list does not store elements at contiguous memory location it connects nodes at different memory location.
- Array has index to directly access the elements there are no indexes in linked list to directly access the elements.
- Linked list contains Nodes which contains the data and the address of the next Node while the array contains only the data in the block.
- Traversal over the arrays is easy while the traversal over the linked list is difficult as compared to arrays.
Answer:
use the TO_DATE function to remove the time values from the dates in each column
Explanation:
DATE types are involved in most obfuscations. One database that has been considered vulnerable in this regard is the Oracle database due to the fact that a time component is always included in its DATE type. Usually, the common practice would be to use the TRUNC function for the purpose of removing the time component, when in real sense, this function does not actually remove the time. Hence to avoid search problems when searchinc for rows with a specific date in a column defined with the DATE data type, it is most effective to use the TO_DATE function to remove the time values from the dates in each column.
