#Lable demonstration. from Tkinter import * class LabelDemo( frame ): """Demonstrate Labels""" def _init_ ( self ): """Create three Labels and pack them""" frame._init_( self ) & initializes frame object # frame file available space self.pack(expand = YES. file = BOTH ) self.Label1 = Label( self, text = "Label with text" ) # resize frame t...
by rubee - Python - 2007-07-28 07:30:37 阅读(2475) 回复(1)
现今,见到的比较多的ethernet frames有如下的四种: a. Ethernet II b. Ethernet 802.3 (Raw), aka Novell Ethernet c. Ethernet 802.3/802.2 by IEEE d. Ethernet SNAP ---------------------------------------------------------------------------------| Preamble | Dest MAC | Src MAC | Length/EtherType | Data | FCS |--------------------------------------------------------------------------...
Inverse Arp Request When encapsulating other protocols the data field of the frame Relay packet contains a Network Level Protocol Identification (NLPID) which can be 0xCC (IP), 0x80 (Sub-Network Access Protocol - SNAP) or 0x81 (OSI). When a SNAP header is identified, the 3-byte Organisational Unique Identifier (OUI) and the 2-byte Protocol Identifier (PID) further identifies the protocol. ...
我自己用php写了一个站,在本地测试的时候没有任何问题 传到服务器之后就出现了问题,有几个页面在frame中打开会报错 “无法打开internet站点 已终止操作”这样的信息 在新窗口可以打开 很郁闷,而且,有时可以打开,有时打不开,请教高手
一次在作网卡驱动时需要看MAC的帧结构,贴张完整的图例。 有一点不同的是: 长度/类型域在802.3中好像只代表长度域,并没有类型域! 本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u2/87831/showart_1797229.html
编程中出现的错误: 1.throws Exception 2. f.setVisible(true); 导致不可见 import java.awt.*; public class A { public static void main(String args[])throws Exception { frame f=new frame("颜色变化"); //定义frame; f.setSize(600,500); //设定frame的大小; f.setVisible(true); //可见 for(int i=0;i红色 Thread.sleep(10); //休眠 } for(int i=0;i黄色 Thread.sleep(10); ...
frame(框架)是Web上经常会看到的页面结构。使用可视Web开发工具(比如Dreamweaver或者Frontpage),虽然可以在WYSIWYG环境中通过简单的鼠标托拽完成frame的构建,但是要实现真正细致甚至强大的功能,仔细理解frame的代码结构至关重要!你将发现,frame原来是这样的亲切易用。 创建基本的frameSET frameSET页面与普遍的Web页面有些不同。虽然仍旧以<HTML>和包含标题的<HEAD>标记以及其他脚本开始,但是其内容仅仅...
frame Tagging ============= 1. ISL - Inter-switch Link 2. 802.1Q ISL 802.1Q cisco proprietary open standard encapsulate frame tagg frame protocol independent dependent (ehter, token ring) new frame (30 bytes) 4-byte field inserted PVST common STP, multiple STP, rapid STP unawared: drop unawared: tag ignored, recognized 1024 VLAN 4096 VLAN no native VLAN native VLAN 1518 Native VL...
an ethernet fragment is a () frame a retransmitted b damaged c broadcast d network