ip-.
1. 0.1.0.1
2. 0.0.0.0
3. 8.8.8.8
4. 255.255.255.255
7. 172.16.1.0
4) 24 (/24) , .
3. 255.255.255.0
5) 15 (/15) , .
5. 255.254.0.0
6) 11 (/11) , .
6. 255.224.0.0
7) OSI: 7
8) tcp/ip Web- HTTPS: 4
9) OSI : 2
10) TCP/IP , : 3
11) OSI WWW : 6
12) TCP/IP (email): 4
13) B:
4. 129.2.55.21
7. 191.252.128.8
.
.
.
MS Windows XP
Linux
Unix
.
1.
2.
3.
7.
8.
.
5.
11.
.
1.
2.
4.
10. .
. .
/ - r-xr-xr-x | |-programs - rwxr-xr-- |-documents - rwxr-xr-- | | | |- - rwxrwxr-- | |- - rwx------ | |- rwxrwxrwx | |- - rwxrwxr-x | |- - rwxrwxr-x |- - rwxrwxr-x1. programs
2. documents
3.
4.
5.
6.
7.
8.
|
|
. .
/ - r-xr-xr-x
|
|-programs - rwxr-xr--
|-documents - rwxr-xr--
| |
| |- - rwxrwxr--
| |- - rwx------
| |- rwxrwxrwx
|
|- - rwxrwxr-x
|
|- - rwxrwxr-x
|- - rwxrwxr-x
3.
5.
6.
7.
8.
. .
/ - r-xr-xr-x | |-programs - rwxr-xr-- |-documents - rwxr-xr-- | | | |- - rwxrwxr-- | |- - rwx------ | |- rwxrwxrwx | |- - rwxrwxr-x | |- - rwxrwxr-x |- - rwxrwxr-x10. .22) o . :
chmod o+w mydocument.txt
mydocument.txt - r-xr-xr-x1. r-xr-xrwx
23) o . :
chmod g+w mydocument.txt
mydocument.txt - r-xr-xr-x3. r-xrwxr-x
24) o . :
Chmod 0070 mydocument.txt
mydocument.txt - r-xr-xr-x5. ---rwx---
25) o . :
Chmod a-r mydocument.txt
mydocument.txt - r-xr-xr-x7. --x--xx
26) o . :
chmod a= mydocument.txt
mydocument.txt - r-xr-xr-x8. ---------
cmd1 . cmd1 .
[user1@unixbox ~/]$ cmd11. ( )