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  • Variable host IP address in iptables rule

    - by DrakeES
    I am running CentOS 6.4 with OpenVZ on my laptop. In order to provide Internet access for the VEs I have to apply the following rule on the laptop: iptables -t nat -A POSTROUTING -j SNAT --to-source <LAPTOP_IP> It works fine. However, I have to work in different places - office, home, partner's office etc. The IP of my laptop is different in those places, so have to alter the rule above each time I change place. I have created a workaround which basically determines the IP and applies the rule: #!/bin/bash IP=$(ifconfig | awk -F':' '/inet addr/&&!/127.0.0.1/{split($2,_," ");print _[1]}') iptables -t nat -A POSTROUTING -j SNAT --to-source $IP The workaround above works. I only still have to execute it manually. Perhaps I could make it a hook executing whenever my laptop obtains an IP address from DHCP - how can I do that? Also, I am just wondering if there is an elegant way of getting it done in the first place - iptables? Maybe there is a syntax allowing to specify "current hardware ip addres" in the rule?

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  • Scraping with multiple IP, in java.

    - by Titi Wangsa bin Damhore
    Well basically I have a scraping application. It scrapes around n items per minute. currently i have only one IP. The site i'm scraping allows me 3 connections per IP. I'm thinking about getting another IP. so i'll be able to get 6 connections. in theory i should be able to get n items in 40 seconds, more or less. currently i'm using java (commons-httpcore) to get the job done. I'm not sure if this is java question or an OS question. my machine has IP 1 and IP 2 how do i connect to, say, www.microsoft.com, using IP 1 and using IP2? how can i specify, which ip i want to use to do a connection?

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  • How can I host a website on a dynamically-assigned IP address?

    - by nick
    I recently upgraded my internet to the point that it is much faster and more reliable than my current webhost. I would like to move my current domain to be hosted at home, but my IP address is dynamic. As far as I know, I only get a new IP when I restart my modem and or router (which is almost never) or when cable one (my ISP) pushes out a firmware update (rarely). There are a few ways I can see doing this: Convince my ISP to give me a static IP Assign my router my current IP to force a static IP (which might work?) Set my DNS record to my current IP address and update it on the rare occasions that it changes. Obviously I'm hoping that the first one works, but I don't want to pay a lot of extra money (if that's what it takes) to get a static IP address. Which of these options will work most reliably?

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  • Tomcat and IIS 7 both on different ip's and different ports

    - by n00b
    I have Tomcat and IIS 7 installed together on a Windows 2008 server. The machine has two IPs (134.133.1.1 and 134.133.2.2). I want Tomcat to handle 134.133.1.1, on port 80, and IIS to handle both 134.133.2.2, on port 80 AND 134.133.1.1, on port 443, but can't seem to get the last two together (I can get one or the other by themselves on IIS, along with the first IP address on Tomcat). I have configured Tomcat to successfully listen to ip 134.133.1.1, on port 80 with this configuration; <Connector port="80" protocol="HTTP/1.1" address="134.133.1.1" connectionTimeout="20000" redirectPort="8443" /> I also have a site configured in IIS bound to ip 134.133.1.1, on port 443 (SSL). When I turn on IIS, after Tomcat, I can reach both 134.133.1.1:80 (Tomcat) and 134.133.1.1:443 (IIS) successfully (as desired). The problem now comes when I want to introduce a new site via IIS, at the new ip address. In IIS I have setup a new site at IP 134.133.2.2, port 80. I can not start the site. The event log shows this error; Unable to bind to the underlying transport for [::]:80. The IP Listen-Only list may contain a reference to an interface which may not exist on this machine. The data field contains the error number. I think this is because IIS 7 tries to listen to port 80 on all IPs, and it cant because Tomcat is taking port 80 for 134.133.1.1. From reading, the resolution is to specify the IP address you want IIS to bind on port 80. The problem is, when I add 134.133.2.2 to the iplisten list, then I get a 404 when I try navigating to 134.133.1.1:443. I assume this is because IIS is no longer listening to ANY port on 134.133.1.1. How do I resolve this such that IIS will return both sites? EDIT: Per request my IIS binding for site A is 134.133.2.2 on port 80 (http) and 134.133.2.2 on port 443. For site B in IIS, the binding is 134.133.1.1 on port 443 (https). Note the IPs in this example are just for example purposes, but consistent with my setup.

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  • VirtualBox Port Forward not working when Guest IP *IS* specified (while doc says opposite)

    - by Patrick
    Trying to port forward from host (Mac OS X) 127.0.0.1:8282 - guest (CentOS)'s 10.10.10.10:8080. Existing port forwards include 127.0.0.1:8181 and 9191 to guest without any IP specified (so whatever it gets through DHCP, as explained in the documentation). Here is how the non-working binding was added: VBoxManage modifyvm "VM name" --natpf1 "rule3,tcp,127.0.0.1,8282,10.10.10.10,8080" Here is how the working ones were added: VBoxManage modifyvm "VM name" --natpf1 "rule1,tcp,127.0.0.1,8181,,80" VBoxManage modifyvm "VM name" --natpf1 "rule2,tcp,127.0.0.1,9191,,9090" And by "non-working", I of course mean not listening (as a prerequisite to forwarding): $ lsof -Pi -n|grep Virtual|grep LISTEN VirtualBo 27050 user 21u IPv4 0x2bbdc68fd363175d 0t0 TCP 127.0.0.1:9191 (LISTEN) VirtualBo 27050 user 22u IPv4 0x2bbdc68fd0e0af75 0t0 TCP 127.0.0.1:8181 (LISTEN) There should be a similar line above but with 127.0.0.1:8282. Just to be clear, this port is listening perfectly fine on the guest itself. And when I remove the guest IP (i.e., clear the 10.10.10.10) the forward works fine, albeit to eth0 (not eth1 where I need it). I can tcpdump and watch the traffic flow back and forth. And yes, I've disabled iptables entirely while testing -- it's not getting blocked anywhere on the guest. As VirtualBox writes in their documentation, you are required to specify the guest IP if it's static (makes sense, no DHCP record it keeps): "If for some reason the guest uses a static assigned IP address not leased from the built-in DHCP server, it is required to specify the guest IP when registering the forwarding rule:". However, doing so (as I need to), seems to break the port forward with nary a report in any log file I can find. (I've reviewed everything in ~/Library/VirtualBox/). Other notes: While I used the above command to add the third rule, I've also verified it showed up correctly in GUI and then removed/re-added from there just to make sure). This forum link -- while very dated -- looks somewhat related in that a port forward to a static IP was not appearing (perhaps they think due to lack of gratuitous arp being sent for host to know IP is there/avail?). Anyway, what gives? Is this still buggy? Any suggestions? If not, easy enough workarounds? What's interesting is that this works perfectly fine on another user's Mac, however he's running a slightly older version (4.3.6 v. 4.3.12).

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  • Android device unable to obtain ip address connecting to AP created with Hostapd

    - by user114392
    I have a wired internet connection that works behind an authenticated proxy server. I followed the steps mentioned here and managed to create a hotspot which my google nexus 7 detects. However, it seems stuck at "obtaining an ip address" and is not able to connect to the internet. I initially received the following error message when running the script in the terminal: dnsmasq: failed to create listening socket for 127.0.0.1: Address already in use [fail] I figured it is because of a conflict with the network manager, I commented out the "dns=dnsmasq" line in the nm configuration file. After a network-manager restart, the first error doesn't show up but I get the following: Configuration file: /etc/hostapd.conf Failed to create interface mon.wlan0: -23 (Too many open files in system) Try to remove and re-create mon.wlan0 In both cases, however, the hotspot is created and is detected by my android device. only that it cannot "obtain an ip address" and connect to it. Is it because my eth0 connects via a proxy server? Or could there be something wrong with the dnsmasq config? Any help would be appreciated.

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  • VBScript Regular Expressions to check IP address validity with some adtional characters

    - by yael
    How to create VB script Irregular expression syntax to check the VPparam (IP address validity) When the last octatat of the IP address is a range between ip's (x-y) and between each IP we can put the "," separator in order to add another IP example of VBparam VBparam=172.17.202.1-20 VBparam=172.17.202.1-10,192.9.200.1-100 VBparam=172.17.202.1-10,192.9.200.1-100,180.1.1.1-20 THX yael

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  • How to get the client ip address in ASP.Net MVC?

    - by melaos
    hi guys, i'm totally new to the asp.net mvc stack and i was wondering what happened to the simple Page object and the Request ServerVariables object? basically what i wanted to do is to pull out the client's pc ip address. but i fail to understand how the current MVC structure has changed all of this. as far as i can understand, most of the variable object has been replaced by the HttpRequest variants? anybody care to share some resources? really a sea of stuff to learn in the asp.net mvc world :) thanks.

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  • slicing up a very big jpg map image , 49000* 34300 pixel

    - by sirvan
    hi i want to write a mapviewer, i must to work small tile of big map image file and there is need to tiling the big image, the problem now is to tiling big image to small tiles (250 * 250 pixel or like this size) so on, i used ImageMagic program to do it but there was problem now is any other programing method or application that do tiling? can i do it with JAI in java? how?

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  • Create big buffer on a pic18f with microchip c18 compiler

    - by acemtp
    Using Microchip C18 compiler with a pic18f, I want to create a "big" buffer of 3000 bytes in the program data space. If i put this in the main() (on stack): char tab[127]; I have this error: Error [1300] stack frame too large If I put it in global, I have this error: Error - section '.udata_main.o' can not fit the section. Section '.udata_main.o' length=0x0000007f How to create a big buffer? Do you have tutorial on how to manage big buffer on pic18f with c18?

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  • slicing up a very big jpg map image , 140000*125000 pixel

    - by sirvan
    hi i want to write a mapviewer, i must to work small tile of big map image file and there is need to tiling the big image, the problem now is to tiling big image to small tiles (250 * 250 pixel or like this size) so on, i used ImageMagic program to do it but there was problem now is any other programing method or application that do tiling? can i do it with JAI in java? how?

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  • IP address detection for geo-location or MAC address much secure?

    - by SuperRomia
    Recent study many websites are using geo-location technology on their Websites. I'm planning to implement one website which can be detect the web visitor more accurate. An found that Mozilla is using some kind of detect MAC address technology in their Geo-Location web service. Is it violate some privacy issue? I believe most of Geo-location service providers only offer country to city level. But the Mac address detection enable to locate the web visitors' location more correctly than using IP address detection. If detect the MAC address is not practical, which geo-location service provider is offering more accurate data to detect my Website visitor around the world?

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  • iphone SDK: How to check user set up a valid IP , Netmask , Router ???

    - by WebberLai
    It is simple to understand after this pic. I add fewtextfields in tableview I already set the keyboard style is number pad. Now the problems is 1.Do I need to create 12 textfields ???ex. UITextField *ip1,ip2,ip3,ip4....or just set different tag for textfield ? 2.How to check user enter wrong char not 3 valid numbers (even the keyboard is set number pad,but it might can paste words...) 3.How to check user did follow this setting rules ??? <1If IP1 is 0~223 , IP2 need to be set 0~255,IP3,IP4 both are 0~255 <2If IP1 is 172 ,IP2 is set 16~31.IP3,IP4 both are 0~255; If IP1 is 192 ,IP2 must be 168.IP3 IP4 are 0~255 <3Netmask set default 255.255.255.0 <4Router 0~223 ,0~255 ,0~255 ,0~255 This IP setting rules is my friends tech me this ...I not sure the rules is right or not?

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  • Drag big picture in small layer?

    - by Tronic
    Hi, I need a plugin for jquery or another js framework, where I can define a small div where i can drag around a big picture, so i get only a clipping of the picture. any ideas? edit: i try to explain i have a small div, like 600px x 450px. this div behaves like a clipping window for a big picture with like 3000px x 2000px. so i only see a specific cutout of the big picture. and i need to drag that big picture around in this small clipping window! c

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  • aptitude update gives 404's for intrepid

    - by dotjoe
    I'm having issues trying to update my packages. I haven't used this server since last September and now I'm getting 404 errors on all the intrepid repos. How do I fix this? Thanks aptitude update Err http://security.ubuntu.com intrepid-security/main Packages 404 Not Found [IP: 91.189.92.166 80] Err http://security.ubuntu.com intrepid-security/restricted Packages 404 Not Found [IP: 91.189.92.166 80] Err http://security.ubuntu.com intrepid-security/main Sources 404 Not Found [IP: 91.189.92.166 80] Err http://security.ubuntu.com intrepid-security/restricted Sources 404 Not Found [IP: 91.189.92.166 80] Err http://security.ubuntu.com intrepid-security/universe Packages 404 Not Found [IP: 91.189.92.166 80] Err http://security.ubuntu.com intrepid-security/universe Sources 404 Not Found [IP: 91.189.92.166 80] Ign http://us.archive.ubuntu.com intrepid-updates/multiverse Packages Ign http://us.archive.ubuntu.com intrepid-updates/multiverse Sources Err http://us.archive.ubuntu.com intrepid/main Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/restricted Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/main Sources 404 Not Found [IP: 91.189.88.31 80] Err http://security.ubuntu.com intrepid-security/multiverse Packages 404 Not Found [IP: 91.189.92.166 80] Err http://us.archive.ubuntu.com intrepid/restricted Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/universe Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/universe Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/multiverse Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid/multiverse Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/main Packages 404 Not Found [IP: 91.189.88.31 80] Err http://security.ubuntu.com intrepid-security/multiverse Sources 404 Not Found [IP: 91.189.92.166 80] Err http://us.archive.ubuntu.com intrepid-updates/restricted Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/main Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/restricted Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/universe Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/universe Sources 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/multiverse Packages 404 Not Found [IP: 91.189.88.31 80] Err http://us.archive.ubuntu.com intrepid-updates/multiverse Sources 404 Not Found [IP: 91.189.88.31 80] Reading package lists... sources.list # # deb cdrom:[Ubuntu-Server 8.10 _Intrepid Ibex_ - Release i386 (20081028.1)]/ intrepid main restricted # deb cdrom:[Ubuntu-Server 8.10 _Intrepid Ibex_ - Release i386 (20081028.1)]/ intrepid main restricted # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://us.archive.ubuntu.com/ubuntu/ intrepid main restricted deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://us.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team. Also, please note that software in universe WILL NOT receive any ## review or updates from the Ubuntu security team. deb http://us.archive.ubuntu.com/ubuntu/ intrepid universe deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid universe deb http://us.archive.ubuntu.com/ubuntu/ intrepid-updates universe deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-updates universe ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu ## security team. deb http://us.archive.ubuntu.com/ubuntu/ intrepid multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid multiverse deb http://us.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse ## Uncomment the following two lines to add software from the 'backports' ## repository. ## N.B. software from this repository may not have been tested as ## extensively as that contained in the main release, although it includes ## newer versions of some applications which may provide useful features. ## Also, please note that software in backports WILL NOT receive any review ## or updates from the Ubuntu security team. # deb http://us.archive.ubuntu.com/ubuntu/ intrepid-backports main restricted universe multiverse # deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-backports main restricted universe multiverse ## Uncomment the following two lines to add software from Canonical's ## 'partner' repository. This software is not part of Ubuntu, but is ## offered by Canonical and the respective vendors as a service to Ubuntu ## users. # deb http://archive.canonical.com/ubuntu intrepid partner # deb-src http://archive.canonical.com/ubuntu intrepid partner deb http://us.archive.ubuntu.com/ubuntu/ intrepid-security main restricted deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-security main restricted deb http://us.archive.ubuntu.com/ubuntu/ intrepid-security universe deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-security universe deb http://us.archive.ubuntu.com/ubuntu/ intrepid-security multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ intrepid-security multiverse

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  • Windows 7 Default Gateway problem

    - by Matt
    Hi, I have a strange problem (or at least seems strange to me) the below are IP configurations for two laptops on my home network which consists of a main router 192.168.11.1 and a connected wireless router (i know this can cause problems but has always worked until I got the win7 machine) at 192.168.11.2 with DHCP disabled. Laptop 1 - Win XP IP: Dynamically assigned by main router default gateway: 192.168.11.1 (main router) This machine gets perfect connectivity. Laptop 2 - Win7 IP: dynamically assigned by main router Default Gateway: 192.168.11.2 THIS IS THE PROBLEM... I cannot seem to get this machine to default to the main router for the gateway UNLESS I go to a static configuration which I would rather not do since I regularly go between my home and public networks. Why is my Win7 machine not finding the main gateway the same way that the other laptop is? I believe that the rest of my setup is fine as it has always worked and it works perfectly when set as static ip and gateway. Please help! Thanks

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  • Get client IP address

    - by Peter Larsson
    Up until now, I have used convuluted approaches to get the current user client IP-address. This weekend I browsed Books Online for SQL Server 2008 R2 (November CTP) and found this new cool function! SELECT  CONNECTIONPROPERTY('net_transport') AS net_transport,         CONNECTIONPROPERTY('protocol_type') AS protocol_type,         CONNECTIONPROPERTY('auth_scheme') AS auth_scheme,         CONNECTIONPROPERTY('local_net_address') AS local_net_address,         CONNECTIONPROPERTY('local_tcp_port') AS local_tcp_port,         CONNECTIONPROPERTY('client_net_address') AS client_net_address  //Peter

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  • How to cross-reference many character encodings with ASCII OR UTFx?

    - by Garet Claborn
    I'm working with a binary structure, the goal of which is to index the significance of specific bits for any character encoding so that we may trigger events while doing specific checks against the profile. Each character encoding scheme has an associated system record. This record's leading value will be a C++ unsigned long long binary value and signifies the length, in bits, of encoded characters. Following the length are three values, each is a bit field of that length. offset_mask - defines the occurrence of non-printable characters within the min,max of print_mask range_mask - defines the occurrence of the most popular 50% of printable characters print_mask - defines the occurrence value of printable characters The structure of profiles has changed from the op of this question. Most likely I will try to factorize or compress these values in the long-term instead of starting out with ranges after reading more. I have to write some of the core functionality for these main reasons. It has to fit into a particular event architecture we are using, Better understanding of character encoding. I'm about to need it. Integrating into non-linear design is excluding many libraries without special hooks. I'm unsure if there is a standard, cross-encoding mechanism for communicating such data already. I'm just starting to look into how chardet might do profiling as suggested by @amon. The Unicode BOM would be easily enough (for my current project) if all encodings were Unicode. Of course ideally, one would like to support all encodings, but I'm not asking about implementation - only the general case. How can these profiles be efficiently populated, to produce a set of bitmasks which we can use to match strings with common characters in multiple languages? If you have any editing suggestions please feel free, I am a lightweight when it comes to localization, which is why I'm trying to reach out to the more experienced. Any caveats you may be able to help with will be appreciated.

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  • Display tracert on Google or Bing Maps

    - by WebDevHobo
    Is there a program of perhaps website that can display a list of ip-adresses on Google or Bing maps? For instance, if I do tracert -d www.youtube.com, I'll get a bunch of IP-addresses, displaying the path my request travelled. I'd think it funny to see this on a map, but I find it hard to enter all these IP-addresses manually. Does anybody know a program that can do this?

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  • Problem with DNS

    - by dotNET
    Hey, I bought a new website, and the company gived me another free domain name, so when I asked for the socond they created it and they told me to change the DNS to look like the first one. It's been a week waiting for it to propagate, today when I type the url I got this error message : If you are the web site owner, it is possible you have reached this page because: * The IP address has changed. * There has been a server misconfiguration. * The site may have been moved to a different server. If you are the owner of this website and were not expecting to see this page, please contact your hosting provider. When I try to add the second domain to my cpanel (Addon domain) I get also another error : The addon domain “abcdef.com” has been created. An account with that login already exists. Do you have any ideas about this problem. Thanks. EDIT I tried to flush the DNS with ipconfig /flushdns, but It's not changing anything.

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  • TCP/IP- what is it exactly?

    - by OckhamsRazor
    I know that this question sounds stupid, but over all these years, I still have difficulty explaining TCP/IP to people. I don't completely get it myself, and even after reading up on it, the distinction is not very clear. What I get so far is that IP deals with networks while TCP involves delivery of messages over that network. I'm not totally convinced though. Also, they reside on different layers of the Internet architecture. Could anyone disambiguate this distinction using a simple analogy or examples? Also, I read this somewhere The difference is that TCP is responsible for the data delivery of a packet and IP is responsible for the logical addressing. In other words, IP obtains the address and TCP guarantees delivery of data to that address. Is this correct? Thanks for helping me out. One last thing- Where does the ethernet come in all of this?

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