300095 : Computer Networks and Internets Autumn - IT/Computer Science Assignment Help

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Module Practice and Quiz What Did I Learn In This Module?

• After a Cisco switch is powered on, it goes through a five-step boot sequence.

• The BOOT environment variable is set using the boot system global configuration mode command.

• Use the switch LEDs to monitor switch activity and performance: SYST, RPS, STAT, DUPLX, SPEED, and PoE.

• The boot loader provides access into the switch if the operating system cannot be used because of missing or damaged system files.

• To prepare a switch for remote management access, the switch must be configured with an IP address and a subnet mask.

• To manage the switch from a remote network, the switch must be configured with a default gateway.

• Full-duplex communication increases effective bandwidth by allowing both ends of a connection to transmit and receive data simultaneously.

• Switch ports can be manually configured with specific duplex and speed settings.

• Use autonegotiation when the speed and duplex settings of the device connecting to the port are unknown or may change.

• When auto-MDIX is enabled, the interface automatically detects the required cable connection type (straight-through or crossover) and configures the connection appropriately. © 2019, 2021 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7 Module Practice and Quiz What Did I Learn In This Module? (Cont.)

• There are several show commands to use when verifying switch configurations.

• Telnet (using TCP port 23) is an older protocol that uses unsecure plaintext transmission of both the login authentication (username and password) and the data transmitted between the communicating devices.

• SSH (using TCP port 22) provides security for remote connections by providing strong encryption when a device is authenticated (username and password) and also for the transmitted data between the communicating devices.

• An IOS filename that includes the combination “k9” supports cryptographic features and capabilities.

• To configure SSH you must verify that the switch supports it, configure the IP domain, generate RSA key pairs, configure use authentication, configure the VTY lines, and enable SSH version 2.

• To verify that SSH is operational, use the show ip ssh command to display the version and configuration data for SSH on the device.

• The following initial configuration tasks should always be performed: name the device to distinguish it from other routers and configure passwords, configure a banner to provide legal notification of unauthorized access, and save the changes on a router. © 2019, 2021 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8 Module Practice and Quiz What Did I Learn In This Module? (Cont.)

• One distinguishing feature between switches and routers is the type of interfaces supported by each

. • Routers support LANs and WANs and can interconnect different types of networks; therefore, they support many types of interfaces.

• The IPv4 loopback interface is a logical interface that is internal to the router. It is not assigned to a physical port and can never be connected to any other device.

• Use the following commands to quickly identify the status of an interface:

• show ip interface brief and show ipv6 interface brief to see summary all interfaces (IPv4 and IPv6 addresses and operational status),

• show running-config interface interface-id to see the commands applied to a specified interface, and

• show ip route and show ipv6 route to see the contents of the IPv4 or IPv6 routing table stored in RAM.

• Filter show command output using the pipe (|) character. Use filter expressions: section, include, exclude, and begin.

• By default, command history is enabled, and the system captures the last 10 command lines in its history buffer

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