netstat

Question 1

netstat

-a

Answer 1

Displays all active TCP connections and the TCP and UDP ports on which the computer is listening.

Question 2

netstat

-b

Answer 2

Displays the executable involved in creating each connection or listening port.

In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.

Question 3

-e

Answer 3

Displays Ethernet statistics, such as the number of bytes and packets sent and received. This parameter can be combined with -s.

Question 4

-n

Answer 4

Displays active TCP connections, however, addresses and port numbers are expressed numerically and no attempt is made to determine names.

Question 5

-o

Answer 5

Displays active TCP connections and includes the process ID (PID) for each connection. You can find the application based on the PID on the Processes tab in Windows Task Manager. This parameter can be combined with -a, -n, and -p.

Question 6

-p <Protocol></Protocol>

Answer 6

Shows connections for the protocol specified by Protocol. In this case, the Protocol can be tcp, udp, tcpv6, or udpv6. If this parameter is used with -s to display statistics by protocol, Protocol can be tcp, udp, icmp, ip, tcpv6, udpv6, icmpv6, or ipv6.

Question 7

-s

Answer 7

Displays statistics by protocol. By default, statistics are shown for the TCP, UDP, ICMP, and IP protocols. If the IPv6 protocol is installed, statistics are shown for the TCP over IPv6, UDP over IPv6, ICMPv6, and IPv6 protocols. The -p parameter can be used to specify a set of protocols.

Question 8

-r

Answer 8

Displays the contents of the IP routing table. This is equivalent to the route print command.

Question 9

netstat -e -s

Answer 9

To display both the Ethernet statistics and the statistics for all protocols

Question 10

netstat -s -p tcp udp

Answer 10

To display the statistics for only the TCP and UDP protocols

Question 11

netstat -o 5

Answer 11

To display active TCP connections and the process IDs every 5 seconds

Question 12

netstat -n -o

Answer 12

To display active TCP connections and the process IDs using numerical form