Class A default subnet mask is 255.0.0.0. Class B default subnet mask is 255.255.0.0. Class C default subnet mask is 255.255.255.0.
Class A default subnet mask is 255.0.0.0.
Class B default subnet mask is 255.255.0.0.
Class C default subnet mask is 255.255.255.0.
Question 2
The default port used for SMTP is:
23
25
80
8080
Correct answer: B
Explanation:
SMTP by default uses TCP port 25.
SMTP by default uses TCP port 25.
Question 3
Which of the following are features of DHCP? (Choose two.)
IP address resolution to canonical names
Secure shell connections
Address reservation
Network file transfer
IP address exclusion
Correct answer: CE
Explanation:
* The Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses for interfaces and services. * Some network devices need to use statically assigned IP addresses rather than addresses dynamically assigned through DHCP. For example, DHCP servers must have statically configured IP addresses. Also, some devices (such as legacy network printers) do not support DHCP. For the devices that need static IP assignments, the company creates an exclusion range from each IP address range.
* The Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses for interfaces and services.
* Some network devices need to use statically assigned IP addresses rather than addresses dynamically assigned through DHCP. For example, DHCP servers must have statically configured IP addresses. Also, some devices (such as legacy network printers) do not support DHCP.
For the devices that need static IP assignments, the company creates an exclusion range from each IP address range.