Question 20 Port addresses are bits. 8 16 32 128 65,536 Question 21 Which of the following is not true about the ping program? By default, it continues to send out packets until we type control +c By default, it shows the time it took each packet to reach the destination but not the route taken It uses ICMP (Internet Control Message Protocol) It outputs a summary of total packets transmitted and times taken at the end All of these are true Question 22 Which of the following programs displays network sockets that are currently in use? ip netstat socket ss traceroute Question 23 Starting with systemd, Linux has replaced all of its network services with the single service NetworkManager. True False