ccna fees

CCNA advanced network technical materials Network Basics Encapsulation: attaches necessary protocol information to the data before network transmission. Unencapsulate: unseal data from a specific protocol header. Peer layer communication: each layer of the source sender's OSI model must communicate with the peer layer of the target. OSI reference model: 1 physical layer: defines electrical, mechanical, and procedural functions and standards for physic

Tags: ccnaThe more complex the interconnection network environment is, the more likely the network is to fail in terms of connectivity, and the cause of the failure is hard to confirm. Before a network failure occurs, the network administrator should constantly monitor network changes and make timely adjustments to prevent problems. When a network fault occurs, appropriate methods and tools should be used to determine the root cause of the fault, and correct troubleshooting plans should be made.

LAN.WANThe last network segment is a WAN connection and requires 2 host addresses. Support WAN links with just 2 primary seats. 2^2-2 = 2.This leaves 8 bits to define the local subnet address. The next available address block is 172.16.2.192/30.Address: 172.16.2.192Binary representation:10101100.00010000.0000010.11000000Mask: 255.255.255.252Represents 30 bits in binary:11111111.11111111.1111111.11111100The IPV4 host address range provided is:172.16.2.193 to 172.16.2.194, broadcast address is 17

En Conf t Hostname SW1 Username CCNA Password CCNA No IP domain-lookup Service Password-encryption Enable Secret Cisco Line con 0 Login Local Logging synchronous Exec-timeout 0 0 Line vty 0 4 Login Local Logging synchronous Exec-timeout 0 0 int VLAN 1 IP addr 192.168.1.1 255.255.255.0 No shut IP Default-gateway 192.168.1.254 Show run Copy Run start

CCNA Experiment Four turn on the WEB Management Service for the routerEnvironment: Windos XP , GNS3.0.7Objective: practice how to turn on the router WEB Management Services, through IE managing the RouterSteps:1.First install the loopback Virtual network card on thephysical machine XP system , open the "Control Panel"-- Add Hardware to do the following650) this.width=650; "src=" Http://hi.csdn.net/attachment/201010/30/0_1288428865pzZC.gif "/>650) thi

IntroductionThis article describes what the IP address and its function and IP address composition, IP address classification, IP subnet partition, subnet mask, public address, private address,VLSM (variable eldest son netmask), CIDR (Non-class inter-domain routing) and other CCNA basics.Article Directory0x1. What is an IP addressthe role of the 0X2.IP address0x3.ipv4 Address Composition0x4.ipv4 Address CategoriesA. Reserved IP addressB. Private IP ad

CCNA Training Course (3) -- Vlan VTP relay single-arm route generation Tree Protocol This is the third day of the CCNA training course. There are many knowledge points on this day, and the experiment content is gradually becoming more complicated.VLAN A vswitch separates the conflict domains and the broadcast domains. A vro separates the conflict domains and the broadcast domains. In a pure exchange network

CCNA Learning must be remembered--Hundred dishesIn the study Shehiren "Computer network" over the name, found that there are some very important but not dissected knowledge points in the book, perhaps in the new version of the content will be constantly updated, but in any case, we can often look at these points of knowledge, strengthen memory. After continuous learning, bloggers will occasionally add something else-something they think is useful to n

From today on we review together to learn the debugging of routers and switches. Based on the CCNA tutorial, we practice a few small commands every day, and make up a little, and finally become an amplifier.Enable: Enter privileged mode and the command prompt becomes hostname# after runConfigure Terminal: Enter the global mode command prompt to change to hostname (config) #Hostname: Naming the deviceExit quit PrivilegeNo IP domain-lookup: Turn off add

CCNA Experiment 24 Security of routing updatesEnvironment: Windows XP , GNS3.0.7.2Objective:Learn how to pass MD5 authentication and passive port protection routing updates, Note that both methods are in EIGRP ,OSPF, RIP, IGRP can be used in all routing protocols. DescriptionMD5 Certification : to prevent invalid routing updates from potentially threatening and damaging the network through routing update authentication between neighbor routers. Pas

CCNA Experiment one landing device consoleEnvironment: Windows XP ,GNS3.0.7Purpose: Know how to log in to a routing device using tools.Steps: First Open the GNS to build the topology environment as follows: 650) this.width=650; "src=" Http://hi.csdn.net/attachment/201010/25/0_1287994002BmG3.gif "/>start R1 and right- view the port connected to the console ( to be used when logging in ) 650) this.width=650; "src=" Http://hi.csdn.net/attachment/201010/

CCNA Experiment 38 ZFW ( Zone firewall ) Environment: Windows XP ,Packet Tracert5.3Objective: To understand the principle and basic configuration of ZFWDescriptionZFW(zone-based policy Firewall), is a zone-based firewall, the firewall policy of zone-based firewall configuration is only effective when data is sent from one region to another. Data in the same region does not apply any policy, so we can use the interface that needs to be used in differ

CCNA Experiment 14 STP redundant backup link (EtherChannel)Environment: Windows XP , GNS3.0.7 , VPCS.exePurpose: Learn how to configure redundant backup links.Steps:1 , open GNS Create the following project:650) this.width=650; "src=" Http://hi.csdn.net/attachment/201011/21/0_1290326291ColF.gif "/>Description:(1) First to add switching modules for SW1 and SW2 two virtual devices(2) Note the console port number for both devices: sw1:2002, sw2:2003(3)

CCNA Experiment 16 fast Spanning Tree Protocol (RSTP)Environment: Windows XP, Packet Tracer5.3Purpose: To understand and configure RSTPDescription: RSTP: Fast Spanning Tree Protocol (Rapid spaning Trees Protocol): This kind of protocol can converge the network faster when the network structure is changed . There are only three port status forbidden ports in RSTP, blocking ports, and listening ports are much shorter than STP convergence time. Steps:

CCNA Experiment 19 static and default routesEnvironment: Windows XP , Packet Tracert 5.3Purpose: To understand the use of static routes and default routesDescriptionstatic routing refers to routing information that is manually configured by the network administrator. When the topology of the network or the state of the link changes, it is necessary to manually modify the relevant static routing information in the router. Static routing information is

Tags: cisco CCNA eigrpEIGRPin order to enhance the internal Gateway routing protocol, it can also be called the enhanced Internal Gateway routing protocol. EIGRPcombining the link state and the distance vector type routing protocolCiscoproprietary protocol using a dispersion correction algorithm (DUAL) for fast convergence, you can reduce the bandwidth footprint by not sending periodic routing update information, whileEIGRPThere are three tables: the

Tags: cisco CCNA VLANVLANthe Chinese name is"Virtual local Area network". is a set of logical devices and users, these devices and users are not subject to physical location constraints, can be based on functions, departments and applications and other factors to organize them, communication with each other as if they are in the same network segment, hence the name of the virtual local area network. VLANwork inOSIthe Reference Model2Layer and Section3

Tags: Cisco CCNA device Basic Configuration1. Define a host name for the routerrouter>enable \ \ Enter Privileged modeRouter#configure terminal \ \ Enter global configuration modeRouter (config) #hostname R1 \ \ Change the router nameR1 (config) #The default router name is "Router", which can be used to differentiate the device from the network for easy management.2. Turn off Domain name resolutionR1 (config) #no IP domain-lookupBy default, when an ad

Tags: cisco CCNA RIPRIP (Routing information Protocol) routing protocol is a kind of routing protocol which has been widely used in small and medium networks. RIP uses UDP packets to exchange routing information with a UDP port number of 520. Normally the RIPV1 message is broadcast, while the RIPV2 message is a group broadcast message, and the multicast address is 224.0.0.9. RIP sends an update message out every 30 seconds. If the device does not rece

CCNA Common commands Chinese comments Access-enable allows the router to create a temporary Access list entry Access-group in the dynamic Access list (ACL) access-list on the application interface defines a standard ip acl www.2cto.com Access-template. Manually replace the temporary Access list entry Appn on the connected router and send the command to the APPN subsystem. The ATM sig executes the ATM signaling command B. manual guide operating system