2024-07-03

Vim Learnings

Keybindings

Put command:

• p: put/paste the deleted text, after the text cursor

Replace Command:

• r<character>: replace command, for example the word typod where o has to be replaced with e to make it typed, move the cursor to the start of the character to be placed(until o) and type re to replace o with e.

Change Command: delete all the characters from the cursor till the end of the word.

• ce: VNKLO, move the cursor to the right ofV and input ce,which deletes all the characters till the end, and type in the required characters.

Internet Protocol

IPV4

32bit integers,represented in 4 numbers separated by . and the numbers are ranging from 0-255. 192.168.1.1: example of IPV4 address.

Drawbacks:

• Limited Address space
• Complex configuration: IPv4 requires mannual configuration or DHCP to assign address.
• Fragmentation: IPv4 allows to fragment packets,chances of packets getting lost.

IPV6

To support increased use of computer networks, internet enabled devices, ipv6 was invented.

• Enhanced packet header for efficient routing.
• Data security through IPSec header field.

Ipv6 address representation as x:x:x:x:x:x:x:x,where x is the hexadecimal values of eight 16digit pieces. Ipv6 addresses ranges from: 0000:0000:0000:0000:0000:0000:0000:0000 to ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Shorthand formats of IPV6 addresses.

• Omit leading zeros Specify IPv6 addresses by omitting leading zeros. For example, IPv6 address 1050:0000:0000:0000:0005:0600:300c:326b can be written as 1050:0:0:0:5:600:300c:326b.

• Double colon Specify IPv6 addresses by using double colons (::) in place of a series of zeros. For example, IPv6 address ff06:0:0:0:0:0:0:c3 can be written as ff06::c3. Double colons can be used only once in an IP address.