access vlan 20 把当前端口放入vlan 20 undo port e1/0/10 表示删除当前VLAN端口10 disp curr 显示当前配置 二、配置交换机支持TELNET system 进入系统视图 sysname 交换机命名 int vlan 1 进入VLAN 1 ip address 192.168.3.100 255.255.255.0 配置IP地址 user-int vty 0 4 进入虚拟终端 authentication-mode password (aut password) 设置口令模式 set authentication password simple 222 (set aut pass sim 222) 设置口令 user privilege level 3(use priv lev 3)
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logical topology Step 1. Given an IP address and mask of 172.20.0.0/24 (address/mask)‚ design an IP addressing scheme that satisfies: Subnet | Number of Hosts | Subnet A | 2 maximum | Subnet B | 6 maximum | Subnet C | 47 maximum | Subnet D | 125 maximum | Always start with the largest number of hosts needed first‚ which in this scenario is subnet D. Network: D Network Address: 172.20.0.0/25 IP Address Range: 172.20.0.1 - 172.20.0.126 Broadcast Address: 172.20.0.127 Subnet Mask: 255
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shutdown command to enable the G0/1.10 PC3 is configured with the wrong default gateway address. Change the default gateway on PC3 from 172.17.10.1 to 172.17.30.1 Subinterface VLAN assignments are switched on R1. Issue the no encapsulation dot1q command to remove the incorrect configuration. Then configure the subinterfaces with the correct encap dot1q command command. Reenter the correct IP address information. ======================================== Step 1: Calculate
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InetAddress)) Socket - Opens a TCP socket to a specific IP address ServerSocket - Creates a server for Sockets to connect to (Only needed for client/server networing) DatagramPacket - Creates a UDP packet which connects through the DatagramSocket DatagramSocket - creates a UDP socket to send DatagramPackets Examples/explenations of all: InetAddress: public static void inetmethod() throws UnknownHostException{ InetAddress address =InetAddress.getByName(ADDRESS_AS_STRING_GOES_HERE);
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next page for the continuation of your sourcecode program ’ VBScript: IP_Array_start.vbs ’ Written by:Kamal ’ Date: 11/25/2012 ’ Class: COMP230 ’ Professor: ’ =================================== ’ This initialize a 2-dimension array ’ of IP Address. The first index +100 ’ is the room# and the second index+1 ’ is the computer# in the room. dim ipAddress(5‚3) ipAddress(0‚0)="192.168.10.11" ipAddress(0‚1)="192.168.10.12" ipAddress(0‚2)="192.168.10.13" ipAddress(0‚3)="192.168.10.14"
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Bozhidar Mochev LAB1 NSLOOKUP 1. Run nslookup to obtain the IP address of a Web server in Asia. 2. Run nslookup to determine the authoritative DNS servers for a university in Europe. 3. Run nslookup so that one of the DNS servers obtained in Question 2 is queried for the mail servers for Yahoo! mail. I assume that taking screens of IPConfig section 2 of the LAB is pointless‚ because that’s just too easy and time wasting. Better to skip onto the next one. Tracing DNS with Wireshark
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1723/tcp closed pptp MAC Address: C8:D7:19:5D:CE:71 (Cisco Consumer Products) Nmap scan report for PHONE Host is up (0.24s latency). Not shown: 998 filtered ports PORT STATE SERVICE 53/tcp closed domain 1723/tcp closed pptp MAC Address: 78:4B:87:C1:3F:B1 (Murata Manufacturing Co.) Nmap scan report for PHONE Host is up (0.055s latency). Not shown: 998 filtered ports PORT STATE SERVICE 53/tcp closed domain 1723/tcp closed pptp MAC Address: 2C:B0:5D:A8:AE:8B (Netgear)
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Q1: If an Ethernet port on router was assigned an IP address of 172.16.112.1/20‚ what is the maximum number of hosts allowed on this subnet? A. 1024 B. 2046 C. 4094 D. 4096 E. 8190 Answer: C Explanation: Given IP address of 172.16.112.1 / 20‚ subnet mask: 255.255.240.0 max. num of hosts =(( 2^12) -2 ) = 4096-2 = 4094 Q2.:An access list was written with the four statements shown in the graphic. Which single access list statement will combine all four of these statements into a single statements that
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problems by providing 128 bits address space and the subnetting is not needed. Besides address shortage‚ VLSM does provide flexibility and scalability for networking addressing management. For CIDR‚ it can help to simply routing data base. Talk about some of the advantages for this post. No all the routing protocols support VLSM‚ and CIDR. How can we guarantee VLSM and CIDR will work in our networks. Comment. Classless Inter-Domain Routing (CIDR) allows a single IP address and subnet to be used to reference
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through the output of the ipconfig /all command. If you are connected to a network that uses DHCP‚ notice the date and time when your lease was obtained and when it is due to expire. On your paper‚ write down your machine’s host name and also the MAC address for your workstation’s NIC. (or paste them here). (or paste them here). 6. Next‚ type ipconfig /release and press Enter. What message is displayed? What implications do you predict this command will have on connectivity? There’s no connectivity
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