Answer:
There could be a collision if a hidden node problem occurs.
Explanation:
CSMA/CA(carrier sense multiple access/ collision avoidance) is a multiple access method in wireless networking, that allows multiple node to transmit. Collision avoidance of this method is based on preventing signal loss or downtime as a result of collision of transmitting multi signals.
If a node at step 4(transmit frame) sends the first frame, the node still needs to send a RTS(request to send) and to receive a Clear to send (CTS) from the WAP, the is to mitigate the issue of hidden node problem as all frame are treated as unit, so other listening nodes, not detected would seek to connect and transmit as well.
Answer: Option(d) is correct
Explanation:
Data warehouse is the storage that holds collected information and data for making acknowledged decision through analyzing the data. Data present in data warehouse is as per subject which contains history and sources of data for understanding and perceiving it.
- Other options are incorrect because data is not coded in various forms,retrieved for certain period of time, real-time update and arrangement in hierarchical form.
- Thus, the correct option is option(d).
The answer to the following question
<span>What kind of problems could you run into if you format a cell with the wrong format for the data type?
is:
there is a great possibility that your file format won't open because it has the wrong format</span>
Answer:
To provide remote network access to the users to work, the network administrator can use virtual private network (VPN) along with some firewall to protect the system from hackers and other security threats.
Explanation:
Virtual Private Network (VPN) can be used to provide remote access to the users who are currently working from some remote areas. Many companies who have their branches or franchises in different parts of the city uses VPN to connect then all with the company server.
In this way, a firewall has been needed that protect the systems of users as well as company to protect from different security hazards such as hackers, authorization of the users and other security threats.
in this case, 12 em[employees who need remote access to the network can be connected through VPN along with the installation of some suitable firewall.
