How many notification levels of UAC did Microsoft include in Windows 7?
A. One
B. Two
C. Three
D. Four
Answer: D
Computer Science & Information Technology
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Based on the netstat output shown in item (d), what is the Layer 4 protocol, connection status, and PID of the process running on port 80?
Display the services currently running. a. Use the ps command to display all the programs running in the background:
[analyst@secOps ~]$ sudo ps –elf [sudo] password for analyst: F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD 4 S root 1 0 0 80 0 - 2250 SyS_ep Feb27 ? 00:00:00 /sbin/init 1 S root 2 0 0 80 0 - 0 kthrea Feb27 ? 00:00:00 [kthreadd] 1 S root 3 2 0 80 0 - 0 smpboo Feb27 ? 00:00:00 [ksoftirqd/0] 1 S root 5 2 0 60 -20 - 0 worker Feb27 ? 00:00:00 [kworker/0:0H] 1 S root 7 2 0 80 0 - 0 rcu_gp Feb27 ? 00:00:00 [rcu_preempt] 1 S root 8 2 0 80 0 - 0 rcu_gp Feb27 ? 00:00:00 [rcu_sched] 1 S root 9 2 0 80 0 - 0 rcu_gp Feb27 ? 00:00:00 [rcu_bh] 1 S root 10 2 0 -40 - - 0 smpboo Feb27 ? 00:00:00 [migration/0] 1 S root 11 2 0 60 -20 - 0 rescue Feb27 ? 00:00:00 [lru-add-drain] 5 S root 12 2 0 -40 - - 0 smpboo Feb27 ? 00:00:00 [watchdog/0] 1 S root 13 2 0 80 0 - 0 smpboo Feb27 ? 00:00:00 [cpuhp/0] 5 S root 14 2 0 80 0 - 0 devtmp Feb27 ? 00:00:00 [kdevtmpfs] 1 S root 15 2 0 60 -20 - 0 rescue Feb27 ? 00:00:00 [netns] 1 S root 16 2 0 80 0 - 0 watchd Feb27 ? 00:00:00 [khungtaskd] 1 S root 17 2 0 80 0 - 0 oom_re Feb27 ? 00:00:00 [oom_reaper]b. In Linux, programs can also call other programs. The ps command can also be used to display such process hierarchy. Use –ejH options to display the currently running process tree.
[analyst@secOps ~]$ sudo ps –ejH [sudo] password for analyst:c. As mentioned before, servers are essentially programs, often started by the system itself at boot time. The task performed by a server is called service. In such fashion, a web server provides web services. The netstat command is a great tool to help identify the network servers running on a computer. The power of netstat lies on its ability to display network connections. In the terminal window, type netstat.1 1 1 ? 00:00:00 systemd 167 167 167 ? 00:00:01 systemd-journal 193 193 193 ? 00:00:00 systemd-udevd 209 209 209 ? 00:00:00 rsyslogd 210 210 210 ? 00:01:41 java 212 212 212 ? 00:00:01 ovsdb-server 213 213 213 ? 00:00:00 start_pox.sh 224 213 213 ? 00:01:18 python2.7 214 214 214 ? 00:00:00 systemd-logind 216 216 216 ? 00:00:01 dbus-daemon 221 221 221 ? 00:00:05 filebeat 239 239 239 ? 00:00:05 VBoxService 287 287 287 ? 00:00:00 ovs-vswitchd 382 382 382 ? 00:00:00 dhcpcd 387 387 387 ? 00:00:00 lightdm 410 410 410 tty7 00:00:10 Xorg 460 387 387 ? 00:00:00 lightdm 492 492 492 ? 00:00:00 sh 503 492 492 ? 00:00:00 xfce4-session 513 492 492 ? 00:00:00 xfwm4 517 492 492 ? 00:00:00 Thunar 1592 492 492 ? 00:00:00 thunar-volman 519 492 492 ? 00:00:00 xfce4-panel 554 492 492 ? 00:00:00 panel-6-systray 559 492 492 ? 00:00:00 panel-2-actions 523 492 492 ? 00:00:01 xfdesktop 530 492 492 ? 00:00:00 polkit-gnome-au 395 395 395 ? 00:00:00 nginx 396 395 395 ? 00:00:00 nginx 408 384 384 ? 00:01:58 java 414 414 414 ? 00:00:00 accounts-daemon 418 418 418 ? 00:00:00 polkitd
[analyst@secOps ~]$ netstat Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost.localdo:48746 localhost.local:wap-wsp ESTABLISHED tcp 0 0 localhost.localdo:48748 localhost.local:wap-wsp ESTABLISHED tcp6 0 0 localhost.local:wap-wsp localhost.localdo:48748 ESTABLISHED tcp6 0 0 localhost.local:wap-wsp localhost.localdo:48746 ESTABLISHED tcp6 0 0 localhost.local:wap-wsp localhost.localdo:48744 ESTABLISHED tcp6 0 0 localhost.localdo:48744 localhost.local:wap-wsp ESTABLISHED Active UNIX domain sockets (w/o servers) Proto RefCnt Flags Type State I-Node Path unix 3 [ ] DGRAM 8472 /run/systemd/notify unix 2 [ ] DGRAM 8474 /run/systemd/ cgroups-agentd. Use netstat with the –tunap options to adjust the output of netstat. Notice that netstat allows multiple options to be grouped together under the same “- ” sign. The information for the nginx server is highlighted.
[analyst@secOps ~]$ sudo netstat -tunap [sudo] password for analyst: Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 395/nginx: master p tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 279/vsftpd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 277/sshd tcp 0 0 0.0.0.0:6633 0.0.0.0:* LISTEN 257/python2.7 tcp6 0 0 :::22 :::* LISTEN 277/sshd tcp6 0 0 :::23 :::* LISTEN 1/init udp 0 0 192.168.1.15:68 0.0.0.0:* 237/systemd-networkClients will connect to a port and, using the correct protocol, request information from a server. The netstat output above displays a number of services that are currently listening on specific ports. Interesting columns are: ? The first column shows the Layer 4 protocol in use (UDP or TCP, in this case). ? The third column uses the
Computer Science & Information Technology
A(n) ________ form displays all fields from a record source in a tabular layout similar to a table's Datasheet view
Fill in the blank(s) with correct word
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What is the purpose of the Frame Check Sequence (FCS) in a frame trailer?
What will be an ideal response?
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________ is the security guarantee that people who intercept messages cannot read them.
A. Confidentiality B. Encryption C. Availability D. Integrity
Computer Science & Information Technology