How does one 'see' open tcpip connections

Hi all,
I am a neophyte w.r.t. mac's and mac os. So bear with me.
In windows - you can go to a 'command line' and enter a 'netstat' command and list all the 'open' IP connections that your computer has. You can look at ports and the processes that have them open, etc...
Is/are there something similar in/on the mac os??? if so - what are they/where? a reference to them?? anything would be a help..
I am pretty good in the windows world or at a command prompt - someone point me in the right direction.
Am trying to troubleshoot where the bottleneck is in slow browser performance.
Thanx,
Steve

I seem to recall reading in these forums somewhere that some instances of slow browser performance had been attributed to a DNS hijacking trojan that had been installed on the victim computer.
You may want to review these articles just to make sure that you don't have it: www.macworld.com/article/60823/2007/10/trojanhorse.html and www.dnschanger.com

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I have had a beachball problem for a number of weeks now, and still can not figure out what is going wrong after four separate Support Desk people and one Genius Bar visit -- maybe you, my friends in the Apple Support Communities, can help decypher this.
Symptoms:
Invariably, my MacBook Pro (MacBookPro8,2) with Mountain Lion (10.8.2) -- after exactly one hourof work (59 minutes, 58 seconds and then...) suddenly goes into beachball mode. No warning -- no new processes -- nothing but the beachball on the dialog I am working on. Within the next minute, all dialogs are unresponsive and I have to hard reboot my computer.
What is surprising is that when the beachball happens and I restart the system, all of my cookies (e.g., my Facebook login cookie, my Google 2-factor) and other status bookmarks (e.g., where the video stops on iTunes) disappear.
And if I wish to prolong my computer time, I have to put the computer in Sleep Mode for about 5 minutes, come back and get an additional hour of work before the beachball returns.
Scarily, I have watched it happen - and tracked the Activity Monitor and see nothing that pops up at that time point. No additional memory taken, no additional CPU -- nothing.
What is surprising is that when the beachball happens and I restart the system, all of my cookies (e.g., my Facebook login cookie, my Google 2-factor) and other status bookmarks (e.g., where the video stops on iTunes) disappear.
Additionally, when I boot in Safe mode - my 16G of RAM is almost totally taken up (15.1Gs) by nothing. Simply that 15.1Gs are "wired". The largest process is the mds - and that is only 500M.
Prior Efforts:
I have inspected the disk with Disk Utility, done both the Internet Hardware check (since my Recovery partition did not have it) and at the Genius Bar (with their super-special hardware check) and no problems. I have removed Launch Agents and Launch Daemons. I have removed startup items and purged the drive.
I keep being told I will have to erase and reinstall, but I think there is something much simplier here: some software that is being triggered to do something one hour after awaking from sleep.
I saw some people suggest it could be f.lux, but I have turned it off and it still happens. Additionally, one of my people suggested it was the Time Machine, so I turned it off -- and it still happened.
Any ideas what could be the problem?
As per everyone else, here is my EtreCheck:
Hardware Information:
          MacBook Pro - model: MacBookPro8,2
          1 2.5 GHz Intel Core i7 CPU: 4 cores
          16 GB RAM
Video Information:
          Intel HD Graphics 3000 - VRAM: 512 MB
          AMD Radeon HD 6770M - VRAM: 1024 MB
Startup Items:
          ChmodBPF - Path: /Library/StartupItems/ChmodBPF
          HWNetMgr - Path: /Library/StartupItems/HWNetMgr
          HWPortDetect - Path: /Library/StartupItems/HWPortDetect
          MySQLCOM - Path: /Library/StartupItems/MySQLCOM
          VirtualBox - Path: /Library/StartupItems/VirtualBox
          ZendServer_init - Path: /Library/StartupItems/ZendServer_init
System Software:
          OS X 10.8.2 (12C60) - Uptime: 0 days 0:10
Disk Information:
          M4-CT512M4SSD2 disk0 : (512.11 GB)
                    disk0s1 (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) /: 511.25 GB (78.47 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R   UJ-8A8
USB Information:
          Western Digital My Passport 07AE 500.07 GB
                    disk1s1 (disk1s1) <not mounted>: 209.7 MB
                    Recovery HD (disk1s2) <not mounted>: 650 MB
                    Backup Disk (disk1s3) /Volumes/Backup Disk: 494.59 GB (138.75 GB free)
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Inc. BRCM2070 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. FaceTime HD Camera (Built-in)
          DisplayLink UV195
          Apple Computer, Inc. IR Receiver
FireWire Information:
Kernel Extensions:
          com.avatron.AVExVideo          Version: 1.7
          com.displaylink.driver.DisplayLinkDriver          Version: 1.8
          net.telestream.driver.TelestreamAudio          Version: 1.0.5
          com.vara.driver.VaraAudio          Version: 1.0.3
          com.avatron.AVExFramebuffer          Version: 1.7
          org.virtualbox.kext.VBoxDrv          Version: 4.2.4
          org.virtualbox.kext.VBoxUSB          Version: 4.2.4
          org.virtualbox.kext.VBoxNetFlt          Version: 4.2.4
          org.virtualbox.kext.VBoxNetAdp          Version: 4.2.4
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
                 [loaded] com.adobe.fpsaud.plist
                 [loaded] com.displaylink.usbnivolistener.plist
                 [loaded] com.fitbit.fitbitd.plist
                 [loaded] com.github.GitHub.GHInstallCLI.plist
Launch Agents:
                 [loaded] com.adobe.CS5ServiceManager.plist
                 [loaded] com.displaylink.useragent.plist
User Launch Agents:
                 [loaded] com.facebook.videochat.sanford.plist
                 [loaded] com.google.GoogleContactSyncAgent.plist
                 [loaded] com.hp.printerAgent.plist
                 [loaded] com.macpaw.CleanMyMac.helperTool.plist
                 [loaded] com.macpaw.CleanMyMac.trashSizeWatcher.plist
                 [loaded] com.macpaw.CleanMyMac.volumeWatcher.plist
User Login Items:
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          Alfred
3rd Party Preference Panes:
          Air Display Preferences
          DeployStudioServer
          DivX
          Flash Player
          Flip4Mac WMV
          Growl
          MenuMeters
          Perian
          Web Sharing
Internet Plug-ins:
          AdobePDFViewer.plugin
          DivXBrowserPlugin.plugin
          Flash Player.plugin
          FlashPlayer-10.6.plugin
          Flip4Mac WMV Plugin.plugin
          Google Earth Web Plug-in.plugin
          googletalkbrowserplugin.plugin
          iPhotoPhotocast.plugin
          JavaAppletPlugin.plugin
          npgtpo3dautoplugin.plugin
          OfficeLiveBrowserPlugin.plugin
          OVSHelper.plugin
          QuickTime Plugin.plugin
          Silverlight.plugin
User Internet Plug-ins:
          Anystream.plugin
          CitrixOnlineWebDeploymentPlugin.plugin
          fbplugin_1_0_3.plugin
          Picasa.plugin
          WebEx64.plugin
Bad Fonts:
          None
Top Processes by CPU:
               3%          DisplayLinkManager
               3%          WindowServer
               2%          EtreCheck
               1%          DashboardClient
               1%          fontd
               1%          SystemUIServer
               0%          Finder
               0%          Flux
               0%          mds
               0%          zdd
Top Processes by Memory:
          262 MB          mds
          131 MB          WindowServer
          98 MB          Dock
          49 MB          com.apple.dock.extra
          49 MB          DisplayLinkManager
          49 MB          mysqld
          49 MB          Finder
          49 MB          Google
          33 MB          java
          33 MB          coresymbolicationd

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If CleanMyMac removes uneeded languages from applications, reinstall the applications. Some do not function well when you remove them.
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ChmodBPF - Path: /Library/StartupItems/ChmodBPF
          HWNetMgr - Path: /Library/StartupItems/HWNetMgr
          HWPortDetect - Path: /Library/StartupItems/HWPortDetect
          MySQLCOM - Path: /Library/StartupItems/MySQLCOM
          VirtualBox - Path: /Library/StartupItems/VirtualBox
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How does one 'see' open tcpip connections

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