ccna icnd1

#创建用户useradd ABC use the VIPW command to view/etc/passwdwhether a new user exists under the file #G却换到最后一行 # When creating an account, a new group is created by default, and the group name is the same as the user name Groupadd ccnavigr #查看组文件 # Add the user to the group gpasswd-A ABC ccna# view users in those groupsgroupsAbc# See who the current user isWhoAmI#切换用户su-abc#-On behalf of the Environment also change # Delete user Userdel Abcgroupdel

Turn from: http://hi.baidu.com/ww2000e/item/98f7b9f6d396d5b430c1994f First of all, we look at a CCNA test common problem: The IP address of a host is 202.112.14.137, the mask is 255.255.255.224, requires computing the network address and broadcast address of the host network. 255.255.255.224 masks contain 256-224 = 32 IP addresses (including network address and broadcast address), the network address with this mask must be a multiple of 32. And the n

router receives a route from OSPF and a route from RIP, it chooses the OSPF route. Because the management spacing of OSPF is 110, the management spacing of RIP is 120. Here's another example: your router receives a route from EIGRP internal, and its management spacing is 90, but you accidentally enter a static route into an IP address where the spacing management address is 1. Then the router uses a static route and does not use EIGRP routing. (☆ Introduction to Programming Network ☆) Finally

This video is the first video course of some network-related training courses for Linux System Engineers. The main content is the IP routing principle and the RIP Protocol. At work, I found that many Linux O M personnel encounter bottlenecks due to lack of basic network knowledge, and it is still a common phenomenon thanks to the inapplicable education system in China ). From the perspective of public welfare and personal knowledge sharing, I plan to share a series of online knowledge. The re

selects an OSPF route. Because the OSPF management interval is 110, and the RIP management interval is 120. Here is another example: for example, if your vro receives a route from Internal, its management interval is 90, But you accidentally input a static route to an IP address, the Gap Management address of this IP address is 1. The vroeigrp uses a static route instead of an IPsec route. The last point is to emphasize that the management interval is the focus of the

workshop will introduce you to the RHCE Lab Test process and skills, hoping to help you obtain your own RHCE certificate.　　RHCE is somewhat different from other MCSE and CCNA certificates because it not only tests the examinee's familiarity with RedHat Linux using multiple choice questions, but also requires a one-day internship, this includes the RedHat Linux installation settings and the Troubleshooting section. The method for applying for RHCE is

Topology Graph OK... 650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M01/4D/55/wKiom1RPmlTCGTIrAADFQF2UNoU402.jpg "Title =" 6.png" alt = "wkiom1rpmltcgtiraadfqf2unou402.jpg"/> 1.SW1 has VLAN 10 and 20, and the configuration protocol enables sw2 to learn the two VLANs. SW1 (config) # VTP Mode Server SW1 (config) # VTP domain ccna SW1 (config) # VTP password Cisco SW1 (config) # Exi Sw2 (config) # VTP mode Client Sw2 (config) # VTP domain

many people, a software developer does not understand Cisco, which is also a fact! The gap between software development and Cisco is really deep and deep in China. If you say that you are engaged in software development and program writing, when facing a ccnp, you will be faced with a lot of problems in the cloud, such as OSPF, route injection, BGP, and frame relay... when you say socket, the segment is wrong... you have been frustrated before...Why? Only because the network and software develo

Address: http://www.myarticlemall.com/Article/Cisco-CCNA-Exam-Tutorial---Troubleshooting-Directly-Connected-Serial-Interfaces/2611 Controllers are the part of the interface that makes the physical connection. Most important to us is what kind of cable is attathed to a serial interface. A dte (Data terminating equipment) cable is the normal cable you shoshould use.Being DTE means you have CT the other end to providing clocking. A dce (Data circuit-te

subnetted, 1 subnetsD 44.44.44.0 [90/2323456] via 25.1.1.2, 00:00:08, serial1/0[90/2323456] via 15.1.1.1, 00:00:08, ethernet0/0Key ChainKey Chain CiscoKey 1Key-string ccnaAccept-lifetime 00:00:00 Jan 1 2011: Jan 1 2012Send-lifetime 00:00:00 Jan 1 2011 00:00:10 Jan 1 2012Key 2Key-string ccnpAccept-lifetime 00:00:00 Jan 1 2012 00:00:10 Jan 1 2013Send-lifetime 00:00:00 Jan 1 2012 00:00:10 Jan 1 2013Key 3Key-string CCIEAccept-lifetime 00:00:00 Jan 1 2013 00:00:10 Jan 1 2014Send-lifetime 00:00:00 Ja

The dynamic routing protocol is also an important part of the routing protocol. Many people may not know the detailed knowledge of RIP, OSPF, and VPN in the dynamic routing protocol, after reading this article, you must have gained a lot. I hope this article will teach you more things. We have already briefly introduced three types of Dynamic Routing Protocol algorithms: Distance Vector Algorithm, link state algorithm, and balanced hybrid algorithm. Let's take a look at the types of these algori

Linux is divided into several stages-general Linux technology-Linux technology and application information. The following is a detailed description. According to my current understanding of linux, several specific subjects are subdivided in each phase, hoping to dismember the entire system into a small piece of things to digest. We have the following materials in hand: laruence's linux Private food. basics: laruence's linux private dish: CCNA learn

GRE over IPsecThis kind of thing can be basically NAT and all kinds of encryption Baotou thingsR1:!interface ETHERNET0/0NBSP;IP Address 192.168.12.1 255.255.255.0ip OSPF 1 area 0---------------- -----------------------------------------------------------------r2:crypto ISAKMP Policy 10 Authentication Pre-sharecrypto ISAKMP key Cisco address 192.168.34.4 !! Crypto IPSec Transform-set CCNA esp-des esp-md5-hmacmode Transport!!! Crypto map Jiance 1 Ipsec-

Objective:2013 Fall High School graduation I caught up with the Beijing University Bird's network class enrollment, endure a huge amount of tuition on the enrollment after graduation teacher gave us some advice the first is more self-study just give us 51cto of the official website address.Initial 51cto:First open 51cto found a lot of courses because of their own skills are very food, feel it is a good learning platform to determine the direction of work to do the network is chosen650) this.widt

Xi ' an who knows where to have Cisco CCIE Network engineer"Xian Cisco CCIE Network Engineer"Xi ' An CCIE network engineer Many people choose a one-meter web engineer Lab, because we can let you learn a lot of real network engineering cases.Introduction XI ' An Cisco CCIE network engineer, first to tell you a fun.I said to my father: "If you work hard, eat a bit tired, I now is rich second generation, every day enjoy on the line, blame you." He thought: "You're right, that's it, you start from n

. kozierok: A great description of TCP/IP and various Wan protocols. The experiment is used to collect evidence and integrate it into the fault discharge practice in this book. It is necessary to complete a large number of forensic experiments, this is a very bad thing. 3. It is also a very difficult task to provide a video for books, because the author has not been trained for nearly N years and has no frequent class environments, therefore, you must create a teaching video in a shared teaching

engineers. Take the Cisco and Microsoft certifications that I personally are familiar. Let's talk about Cisco certification first. In fact there are a lot of Chinese people are most familiar with the CCNA-CCNP-CCIE series. The order and level are arranged from low to high. Let's talk about a fun phenomenon first. CCNP must pass CCNA, while CCIE can be obtained directly. Many people know this. I have not re

Interface Iprouter (config-if) #no shutdown //open port, default off Router (config) #exit/*=part2 OSPF Dynamic routing configuration */router (config) #router ospf1 NBSP;//enables the OSPF protocol, the subordinate OSPF process id=1//Specifies the advertisement network, and belongs to the OSPF area id=0router (config-router) #network 192.168.2.0 0.0.0.255area0router (config-router) #network 10.254.10.00.0.0.255area0router (Config-router) #^zrouter#showrrouter#showiproute# Link Test PC0 and PC1

users, assign account permissions, use RAID technology and LVM disk array, such as the most basic knowledge, must master solid, in order to go farther. About basic skills to buy a book "Linux should Learn" to self-study, this is my technical enlightenment reading, very good.2. Building ServicesThere are many kinds of services on Linux, and each company uses different, but the most common and basic must learn, like FTP, Bind, DHCP, Samba services to understand will be simple configuration, and l

Linux System Management1. Storage ManagementTraditional disk PartitioningRAID technology, implementation of soft raidLvmFile Management SystemExt XFS Btrfs2. Package ManagementRPM Yum DNF3.sed gawk4. Process Management5. Network ManagementNetworking Basics (Cisco CCNA+CCNP)Attribute management of the networkParameter detection of the network6.Linux Kernel ManagementCompiling and installing the kernelClipping of the kernelCustom kernels7.Linux system S