Port 21

(a)  

Port 22

(a)  

Port 23

(a)  

Port 25

(a)  

Port 53

(a)  

Port 67

(a)  

Port 68

(a)  

Port 69

(a)  

Port 80

(a)  

Port 443

(a)  

Port 110

(a)  

Port 123

(a)  

Port 143

(a)  

Port 161

(a)  

Port 500

(a)  

Port 3389

(a)  

Port 49

(a)  

Port 88

(a)  

Port 119

(a)  

Port 162

(a)  

Port 389

(a)  

Port 514

(a)  

Port 1701

(a)  

Port 1723

(a)