dns | 易学教程

Force capitalize letters in domain name [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . So I understand the fact that domain names are case insensitive: google.com, GOOGLE.COM, GooGLe.Com, gOOgle.cOm ===> google.com but my question is: Is it possible to force letters in a domain name to appear capitalized by default? For example, if I owned www.crazycapitalization.com is there any way I could make

Dns.GetHostEntry returns multiple IP addresses

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问题 This question probably highlights a lack of understanding of networking principals on my part, rather than a programming issue. I'm doing a lookup on a hostname using Dns.GetHostEntry This returns an IPHostEntry to me, which has an AddressList property which is an array of IPAddress. I always thought there is a 1 to 1 mapping between hostname and IP, but I'm finding that in some cases I get back several IPAddress(es) for the same host. This is a surprise to me. Which part of domain name

Dns.GetHostEntry returns multiple IP addresses

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计算机网络 - 练习（二百零一）

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计算机网络练习（二百零一） SNMP 是一种异步请求/响应协议，采用（）协议进行封装。 A. IP B. ICMP C. TCP D. UDP ---------------------------------------- 答案： D 解析： STDD（石头蛋蛋）：SNMP、TFTP、DNS、DHCP【用 UDP 协议】路由器的访问控制列表（ACL）的作用是（）。 A. ACL可以监控交换的字节数 B. ACL提供路由过滤功能 C. ACL可以检测网络病毒 D. ACL可以提高网络的利用率 ---------------------------------------- 答案： D 解析： ACL 是对通过网络接口进入网络内部的数据包进行控制的机制，分为标准 ACL 和扩展 ACL （Extended ACL）两种。标准 ACL 只对数据包中的资源地址进行检查，扩展 ACL 对数据包中的资源地址、目的地址、协议以及端口号进行检查，作为一种应用在路由器接口的指令列表，ACL 已经在一些核心路由交换机和边缘交换机上应用，从原来的网络技术扩展为端口限速、端口过滤、端口绑定等二层技术，实现对网络的各层面的有效控制。具体到安全领域来说，ACL 的作用主要体现在： ① 限制网络流量提高网络性能通过设定端口上、下行流量的宽带，ACL 可以定制多种应用的宽带管理

WPF/MVVM: Delegating a domain Model collection to a ViewModel

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问题 A domain model collection (normally a List or IEnumerable) is delegated to a ViewModel. Thats means my CustomerViewModel has a order collection of type List or IEnumerable. No change in the list is recognized by the bound control. But with ObservableCollection it is. This is a problem in the MVVM design pattern. How do you cope with it? UPDATE : Sample of how I do it: public class SchoolclassViewModel : ViewModelBase { private Schoolclass _schoolclass; private ObservableCollection

Setting up Reverse DNS Records

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问题 This question is not directly programming related but I need my Server to pass Spam filters for my app to work properly. I talked to my ISP about rDNS and the guy from tech-support told me if I write an email with what they should add to my DNS record they would do that. My question: What should I tell him to add if my hostname is "http://niklasfi.de" and my is 78.31.67.216? Thanks für the answers. I tried searching on the Web but i only very specific anwers concerning a single ISP. 回答1:

Can Dns.GetHostEntry ever return an IPHostEntry with an empty AddressList?

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问题 I'm just wondering if there can be a case where the hostname can be successfully resolved but the returned hostEntry.AddressList is empty. Currently I'm doing something like this: IPHostEntry hostEntry = Dns.GetHostEntry("some.hostname.tld"); if (hostEntry.AddressList.Count() < 1) { // can that ever happen? throw new ArgumentException("hostName has no assigned IP-Address"); } TcpClient client = new TcpClient(hostEntry.AddressList[0], 1234); My assumption is that Dns.GetHostEntry either throws

Setup Mesos-DNS dockerized on a mesos cluster

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问题 I'm facing some trouble trying to run mesos-dns dockerized on a mesos cluster. I've setup 2 virtual machines with ubuntu trusty on a windows 8.1 host. My VMs are called docker-vm and docker-sl-vm ; where the first one runs mesos-master and the 2nd one runs mesos-slave. The VMs have 2 network cards; one running NAT for accesing internet through the host and the other one is a Host-only adapter for internal communication. The IPs for the VMs are: 192.168.56.101 for docker-vm 192.168.56.102 for

Need To Build Simple DNS Resolver in C [duplicate]

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问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: How to Build a custom simple DNS server in C/C++ As the title says I need to build a simple dns resolver in C... Not in C++, I have looked on internet for some tutorials to help me get going but mostly find C++. Wondering whether anyone knows of a tutorial to get me started or can give me a couple of tips on how to build my DNS request header in C... Any help will be much appreciated. 回答1: I have written a

Customizing URL in Jenkins

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问题 I've created Jenkins for managing my project. I want to share these files with a few people. Problem is that URL is http://localhost:8080/ . How can I make it public for my co-workers (I want it public like this side)? I know there is "Jenkins URL" setting in configuration, but when I'll put URL there the page doesn't exist. Any ideas how to do it? (I'm beginner with this stuff so could you explain it to me? thx) I'm using W7 x64 回答1: You need 2 things at first: You need to have an static