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Networking Fundamentals: Command-Line Interface and VLAN Management, Lecture notes of Computer Systems Networking and Telecommunications

An overview of the command-line interface (cli) and virtual local area network (vlan) management in networking. It covers topics such as hostname configuration, password protection for console, auxiliary, and vty ports, enabling and securing privileged mode, interface status verification, network connectivity testing, vlan creation and assignment, trunking protocols, and routing table management. The document also includes a series of hands-on commands and scenarios to help network administrators and students understand and apply these fundamental networking concepts. With its comprehensive coverage of cli and vlan management, this document can serve as a valuable resource for network professionals, it students, and lifelong learners seeking to enhance their understanding of essential networking skills.

Typology: Lecture notes

2023/2024

Available from 10/17/2024

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Networking 2
Command-Line Interface (CLI)
Ts a text-based platform that allows users to respond to visual prompts by entering single
commands into the interface and receiving a response in the same manner.
Hostname
This will alter the name of the device that is displayed when you connect to the
router/switch
Hostname [name of the device]
This command is to change the name of the network device
Basic Passwords for Console, Auxiliary, and VTY
This password protection to restrict access to the CLI of your router
This command is use to secure the access to console port to the CLI
Router(config)# line console 0 Router(config-line)# password [password] Router(config-
line)# login Router(config-line)# logging synchronous Router(config-line)# exec-timeout
[min] [sec]
This command is use to secure the access to auxiliary port to the CLI
Router(config)# line aux 0 Router(config-line)# password [password] Router(config-line)#
login Router(config-line)# logging synchronous Router(config-line)# exec-timeout [min]
[sec]
This command is use to secure the access to vty 0 4 port to the CLI
Router(config)# line vty 0 4 Router(config-line)# password [password] Router(config-
line)# login Router(config-line)# logging synchronous Router(config-line)# exec-timeout
[min] [sec]
enable password [password]
This command is use to secure the privileged mode in plain text
enable secret [password]
This command is use to secure the privileged mode but is it is encrypted
service password-encryption
It encrypts all current passwords and also the future plaintext passwords
pf3
pf4
pf5

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Networking 2 Command-Line Interface (CLI)  Ts a text-based platform that allows users to respond to visual prompts by entering single commands into the interface and receiving a response in the same manner. Hostname  This will alter the name of the device that is displayed when you connect to the router/switch Hostname [name of the device]  This command is to change the name of the network device Basic Passwords for Console, Auxiliary, and VTY  This password protection to restrict access to the CLI of your router This command is use to secure the access to console port to the CLI  Router(config)# line console 0 Router(config-line)# password [password] Router(config- line)# login Router(config-line)# logging synchronous Router(config-line)# exec-timeout [min] [sec] This command is use to secure the access to auxiliary port to the CLI  Router(config)# line aux 0 Router(config-line)# password [password] Router(config-line)# login Router(config-line)# logging synchronous Router(config-line)# exec-timeout [min] [sec] This command is use to secure the access to vty 0 4 port to the CLI  Router(config)# line vty 0 4 Router(config-line)# password [password] Router(config- line)# login Router(config-line)# logging synchronous Router(config-line)# exec-timeout [min] [sec] enable password [password]  This command is use to secure the privileged mode in plain text enable secret [password]  This command is use to secure the privileged mode but is it is encrypted service password-encryption  It encrypts all current passwords and also the future plaintext passwords

Show ip interface brief  displays the summarized status of all interfaces The interface is disabled  The IT staff checks the summarized status of interfaces using show ip interface brief, the FastEthernet0/4 is in Administratively down. What is the meaning when the status is Administratively Down and the Line Protocol is also Down? PING  is the tool to test the network connectivity VLAN  is a type of subnetwork that can group together collections of devices from various physical Local Area Networks (LAN). LAN  is a group of computers and devices that share a communications line or wireless link to a server in the same geographic area. vlan 1  is the default vlan in Cisco switches? Switch(config-if)#switchport mode access  right command to turn a switch port into an access port Switch(config-if)#switchport access vlan 9  Command to assign an access port into vlan 9 2 - 1001  Select the range of vlans you can use, create and delete in a Cisco switch VLAN database  Where are VLAN configurations being saved in a switch?

Routing Table  This table is stored in the router’s RAM instead of the FLASH memory. This allows the router to access the routing table quickly. Connected routes  are automatically placed in the router's RAM (Routing Table) Static routes  are configured manually in the router's RAM (Routing Table) Tracert  command determines the path taken by the source IP to reach the destination IP. Routing protocols  In this type of route, the routers will send information to other routers on how to reach a particular network. Enable secret [password]  You want to encrypt the privileged mode password for enhanced security. Which command should you use to achieve this? Line console 0  You need to set a password to restrict access to the console port of the router. Which command should you use to enter to the line configuration? Implement Virtual LANs (VLANs)  You are dealing with network performance issues caused by large broadcast domains. What solution can you implement to address this problem and increase the number of broadcast domains? Name MTExam  You need to create a VLAN with the name "MTExam" on a switch. Which commands should you use to achieve this? Show vlan brief  You want to verify the VLAN configuration on a switch, including the VLAN name, status, and associated ports. What command should you use for this purpose?

Switchport mode trunk  You are configuring trunking on a Cisco switch to enable communication between multiple VLANs. What command should you use to configure a trunk port manually? Show interfaces trunk  You are working on a network and want to verify the trunking status of all interfaces. What command should you use to display information about all the trunk interfaces on a Cisco switch? ip route 192.168.7.0 255.255.255.0 1.1.1. 5  You need to manually configure a static route on a router to reach the destination network 192.168.7.0 with a subnet mask of 255.255.255.0. The first hop IP address to reach this network is 1.1.1.5. What command should you use to implement this static route? Show ip route  You want to verify the static route configuration information on a router. Which command should you use to display this information? ip route 0.0.0.0 0.0.0.0 [first hop IP or outgoing int]  You need to implement a static default route on a router to direct packets for networks not present in the routing table. What command should you use to configure this static default route with a next-hop IP address?