Why are port numbers included in the TCP header of a segment? {Ans: to enable a receiving host to forward the data to the appropriate application}Which statement is true about variable-length subnet masking? {Ans: the size of each subnet may be different, depending on requirements}Which connection provides a secure CLI session with encryption to a Cisco switch? {Ans: an SSH connection}Which procedure is used to reduce the effect of crosstalk in copper cables? {Ans: twisting opposing circuit wire pairs together}What subnet mask is needed if an IPv6 network has 40 devices that need IP addesses and address space is not to be wasted {Ans: 255.255.255.192}What is the binary representation of 0xCA? {Ans: 11001010}Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices? {Ans: 192.168.10.128}What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server? {Ans: The computer receives an IP address that starts with 169.254}How many