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  • Proccess of carrying out a BER Test

    - by data
    I am subscribed to an ISP supplying a 3meg ADSL line. Lately (for the last 4 weeks) speeds have dropped from the usual average downstream speed of ~250kbps to just 0.14Mbps (according to speedtest.net) and employees are complaining about lack of access to the server. I have been calling customer support and logging calls for the last 3 weeks, but they have been unable to determine the source of the problem other carrying out a few bitstream tests and checking the DHCP renewal times. I am going to call back and suggest carrying out a BER test. What type of equipment is needed to carry out this test? I have access to a wide range of Cisco networking equipment. Other: We dont need a leased line as there are less than ten employees.

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  • Character coding / programming

    - by Jery
    Lately I tryed a few times to create characters for some games, but at some certain point (especially when collision detection came in) everything became messy and the interaction between chars, the world and certain items had a lot of bugs. So here is my question, how do you ussualy keep track of actions that your character is allowed to do, or more in general do you have some links / advices how to set up a char efficiantly? I´m working on a char right now, who should at least be able to run, jump, pick items up and use different fighting animations. Most ideas I came up with until now use some kind of action.priority / action.duration system to determain whats possible and what not, or a "action-manager" which defines for every action what is possible from that action on but it all doesnt work that well together.

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  • Does a single LACP channel over multiple switches increase redundancy?

    - by Sirch
    I am curious for opinions, findings, or evidence that having multiple interfaces bonded using LACP to ports in multiple switches can increase redundancy. Previously bonded interfaces have always been to a single switch, with a redundant channel to another port. Without getting into vendor specifics, my thought is that as this is a single LACP, the likelihood that an event or change could lead to a wide service outage. Without having the spare equipment or time to test this single channel over diverse switches, could anyone with a greater networking knowledge than myself, tell me if there a network side event that would bring down the network connectivity to a server that had created a bonded interface to two ports on separate switches? Does the use of bonded ethernet channels across multiple switches (that we are advised that we can use) from the server, provide both improved throughput (unquestionably), and improved redundancy (uncertain). Could/would network events such as switch failure, port migration, patching, recovery, etc, cause the channel for both server network interfaces to be unavailable? Thanks in advance.

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  • VMware - Broadcom 1000Gbps NIC does not link at 100Mbps to a Cisco switch port

    - by Spirit
    Today we've stumbled on a very awkward situation with our VMWare Server. The server is with ESX 3.5 that has a 1Gbps NIC. We bought a brand new managed Cisco Linksys switch with 10/100Mbps interface ports but when we plugged the cable in one of the ports the link simply does not wanted to activate :S... Does anyone with more VMware experience have ever had similar problem? From what I know is that 1Gbps NICs are backwards compatible with 100Mbps switches. This is what we've tryed so far but with no success: Tryed: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004089 Tryed to modify the /etc/modules.conf folowing the guide from this article http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=813 After the changes I have restarted the networking services using # service network restart, # service mgmt-vmware restart and # service vmware-vpxa restart It seems that no matter how many times, or whatever approach/method (GUI or Shell) we try to change the speed and duplex of the network adapter and to force it to 100mbps it only accepts 1Gbps .. I am starting to go nuts :@

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  • I believe I need a wireless access point, but can I do it with a wifi router?

    - by Flotsam N. Jetsam
    My needs are simple, I think: I have a laptop upstairs with a usb wifi that I use to connect to my neighbor's wifi which I share (with their knowledge). I have a laser printer downstairs that my wife doesn't wants to stay down there (big, bulky and ugly), but that we both need to print stuff off. It has wired networking and I have wired hub and router down there. The usb wifi on the laptop has absolutley the best reception I've ever seen or heard of. I cannot get onto the neighbor's net with the thing downstairs though--sortof in the ground. What do I need downstairs to give printer access to my laptop wirelessly? One thing I can't do in this solution is have a computer on downstairs, so I would think that would eliminate a usb solution.

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  • Programming Interview : How to debug a program?

    - by Jake
    I was recently asked the following question in an interview : How do you debug a C++ program ? I started by explaining that programs may have syntax and semantic errors. Compiler reports the syntax errors which can be corrected. For semantic errors, various debuggers are available. I specifically talked about gdb, which is command line, and Visual Studio IDE's debugger, which has a GUI, and common commands. I also talked about debug and release version of code, how assertions should be used for debug build, how exceptions helps in automatic cleanup & putting the program in valid state, and how logging can be useful (e.g. using std::clog). I want to know if this answer is complete or not. Also, I want to hear how other people will go about answering this question in a structured manner ? Thanks.

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  • How to balance programming projects between feasibility and usefulness

    - by tyjkenn
    I've become fairly competent as a programmer, but I would not say I am a master. I work independently, most as a hobby, although I have done some freelance PHP work. I tend to find myself dabbling in a lot of things: Java Android SDK, Arduino, game scripting, Lua, etc. I've reached the point where I want to start a real software project, but cannot think of a small enough project that allows me enough practice, while still being able to publish a decent piece of software in a reasonable amount of time, and build up a portfolio. More specifically, I was looking at Ubuntu development, in Python, using the Quickly toolset, which includes the PyGTK libraries. So the question is, what is the best way to come up with a small project that is still useful, as a starting point to a software development career?

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  • Does a person's day-to-day neatness (outside of programming) relate to quality and organization in programming?

    - by jiceo
    Before anyone jumps into any conclusion, I had a discussion with a friend (who's not a programmer at all) about the relationship between a person's neatness habit and the degree of neatness generally shown in works by the same person. This led me to think about this situation: Let's imagine you knew a programmer whose house was very messy. This person's lifestyle is messy by nature. On his desk there are books, papers, STUFF, piled everywhere including on the floor, mixed with dirty clothing, with no obvious organization at all. If you asked him to find a book he hasn't touched for at least a week from the cluster of chaos, he would take at least an hour to do so. How likely is it that he will produce very clean, consistent, and organized code that other people can use? Are there CS legends that are/were notoriously messy in day-to-day habits?

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  • Dns works, can ping, but cannot load web pages in browser

    - by user1224595
    Yesterday I changed routers, and my desktop computer started acting up. I could ping websites, and nslookup was able to resolve names to addresses, but neither chrome, firefox, nor ie could load any webpages. None of my other computers connected to the same wireless router have any problems. I connect my desktop to the router through a cheap wifi dongle. I did a wireshark capture of the browser request, and I have uploaded the pcap here. https://drive.google.com/file/d/0B7AsPdhWc-SwbTV0bUJLQXo4UUE/edit?usp=sharing One strange thing I noticed was the spamming of ssdp packets. I am not super familiar with networking, but it seems that it is not a problem with the router, as dns works, and so does dhcp (the desktop is assigned an address correctly). Any help would be appreciated.

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  • Can't connect printer wirelessly to linksys wrt54g using WPS

    - by Mark J Seger
    I've already blown over 1/2 day on this. I keep checking and rechecking my router settings and they agree with what the documentation says for my brand new HP4620 printer. Supposedly I just tell the router to listen for connections and tell the printer to connect. It fails every time! Further, I have also read some opinions that when things are not configured correctly the linksys will disable WPS and it looks like that's happening as well. Further, it's causing other wireless devices in my house to lose there connectivity until I re-enable WPA networking on the router. Has anyone been here before? This is driving me crazy... -mark

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  • Programming a trading strategy

    - by Rob
    Excuse me if I'm not descriptive enough, as I do not have much of a background when it comes to these things: How would I go about coding a primitive trading strategy and link it to some sort of artificial trading environment? Where do I start, and what are some other essential questions I should be asking? I am interested more in doing this because it interests me than making returns. Ideally it utilizes random/historical market data and doesn't actually execute any real trades. My background: I'm almost done my undergrad degree in computer science, and have had intro finance and economic courses. Familiar mostly with C and Java.

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  • How to interconnect laptop, PC, Android & Symbiam phones with WiFi?

    - by noquery
    What I have Level One wifi Router hub Laptop with Windows 7 (wifi enabled) Desktop PC with Windows 7 (with no wifi, maybe LAN cables can help) 2 android & 1 Symbian Phones each wifi enabled. LAN Cables Hathway Internet connection which allows only 1 login to access internet What I want Is it possible to access internet on PC, laptop, mobiles at the same time with only one connection? Since I don't know even A of networking so please suggest some software which require minimum cofiguration. Let me know if any other hardware I require.

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  • putty ssh client become not responding frequently in windows 7

    - by Sankaran
    with celeron processor and 512 MB ram windows 7 takes too much time even to open a folder in windows explorer. I connect to internet with GPRS modem. When I tried to connect with remote linux machine with putty ssh client. The problem is the putty becomes Not responding in 2 or 3 minutes. I've to connect again and putty goes Not responding again. When i tried in Safe mode with networking, GPRS modem is not even detected. the modem is USB data card. Is it possible load USB drive in safe mode of windows 7 or any other possibility to connect with remote machine via ssh

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  • Reasons for Wi-Fi to be slower on Ubuntu compared to Windows?

    - by den-javamaniac
    I'm using 64-bit Ubuntu 12.04 and Windows 7 64 bit – dual boot on the same computer. Connecting to the same wireless network. And it turns out that on Windows I get a more stable and stronger signal than on Ubuntu. To my knowledge there's a router which serves as a gateway and then there's a cable connected to the router which goes further to ISP, so the results for both OS should be the same. I've tested the issue on both OSs at various times and it gave me the same result. The question is why? Why Ubuntu networking is worse than that of Windows?

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  • How do you combat programming fatigue?

    - by Karpie
    Not fatigue as in 'I need sleep' but fatigue as in 'I just can't be bothered anymore' which usually sets in when you hit roadblocks in whatever project you're working on, generally the closer you get to deadlines. It can be in work projects or personal projects, but it's something I keep hitting more and more lately. I'll get an idea, get into working on it, have a few really good days and make progress, then just some niggly things will trip me up, I can't get things working the way you want, I've hit limitations in the framework, I've got problems I can't find documentation for, etc. and it just gets too frustrating. Or am I alone in this?

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  • Best/ most efficient way to learn a programming language as a beginner [closed]

    - by dizzytri99er
    I am a student and have obtained a one year placement at a business that develops an e-commerce system using C#, HTML, WPF, javascript, ASP and more. Although I do have a little bit of knowledge, I find myself being assigned a lot of tasks that are beyond me and even when I ask for help, the response I get is often cryptic to me. I stare at as much code as possible to just try and "throw myself into it" but I often just get lost in the code I like to consider myself a fast learner and I am damn determined to be a good programmer. I would just like to ask if there are some tips for me to catch up as quick as possible? I don't want to be a nuisance and sit here and ask for help 24/7. I just want to crack on!

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  • A question on choosing the next programming language between C/C++ and other languages

    - by SidCool
    I am a java developer (web app and standalone applications) who knows JavaScript, HTML, CSS and has mostly worked on Web applications. I have no knowledge of C/C++ or any other lower level languages. I feel like I should strengthen my CS basics by learning a fundamental language. Should it be C or C++? I am also inclined to learn Objective-C. Does it need basics of C or C++? Or should I go for new languages like Python, Google's Go etc. I know this is a cliche question asked very frequently, but I can use some help here.

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  • Web App for storing and organize programming information?

    - by Fabzter
    So, I've found myself, after several years of coding (I consider myself a coder, rather than a programmer) full of links and loose snippets and coding tips, all dispersed across the web. In such way it is barely usable, even when every bit is important or interesting. I thought of simply storing the links in delicious or something alike, but it's not really the links I want to keep, I just need the succinth info. So I was thinking to use some web app, something like a wiki, maybe much more simple, so I could access it though my mobile if I need it. I could code it, but as I stated it before, I'm more of a code monkey, and I'm sure my solution would be far from decent... Can anyone give me recommendations on this?

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  • Designing object oriented programming

    - by Pota Onasys
    Basically, I want to make api calls using an SDK I am writing. I have the following classes: Car CarData (stores input values needed to create a car like model, make, etc) Basically to create a car I do the following: [Car carWithData: cardata onSuccess: successHandler onError: errorHandler] that basically is a factory method that creates instance of Car after making an API call request and populating the new Car class with the response and passes that instance to the successHandler. So "Car" has the above static method to create that car, but also has non-static methods to edit, delete cars (which would make edit, delete API calls to the server) So when the Car create static method passes a new car to the successHandler by doing the following: successHandler([[Car alloc] initWithDictionary: dictionary) The success handler can go ahead and use that new car to do the following: [car update: cardata] [car delete] considering the new car object now has an ID for each car that it can pass to the update and delete API calls. My questions: Do I need a cardata object to store user inputs or can I store them in the car object that would also later store the response from all of the api calls? How can I improve this model? With regards to CarData, note that there might be different inputs for the different API calls. So create function might need to know model, make, etc, but find function might need to know the number of items to find, the limit, the start id, etc.

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  • Can IP v4 and IP v6 share a single physical Ethernet?

    - by sleske
    I keep reading about the transition from IP v4 to IP v6, and the possible advantages and problems. One thing that keeps popping up is "dual-stack" networking, meaning (I believe) a host can speak both IPv4 and IPv6. I don't quite understand how this works, however. Can a host actually transmit using IPv4 and IPv6 at the same time over the same physical Ethernet (like e.g. HTTP and FTP can be used simultaneously)? Or is the physical network strictly IPv4 or IPv6, with the "other" protocol sent via tunneling?

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