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Cisco-IOS
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boot system - This is a global command that allows you to specify the source of the IOS software image to load. If you configure more than one source, attempts are made to load the IOS from the first command in the configuration to the last successively. If the first fails, the second boot command is used.
boot system rom - Loads IOS from ROM.
boot system flash - Loads the first file from flash memory.
boot system tftp < tftp_address > - Loads IOS with a filename from a TFTP server.
i. Telnet, FTP, and TFTP:
1. Telnet is used for terminal emulation that runs programs remotely. Telnet uses TCP/IP protocol.
2. Telnet requires a username and password to access.
3. FTP (File Transfer Protocol) is a connection oriented protocol. It uses TCP/IP for file transfer. Compare this with TFTP (Trivial File Transfer Protocol) that uses UDP (Connectionless protocol). SNMP uses UDP over IP. Tracert, Ping uses ICMP as their base protocol. FTP is used to transfer files.
Both FTP and Telnet are client-server protocols. Note that TCP/IP is a client server oriented protocol.
CCNA study guide.
CCNA study guide.
Find out the error in configuration.
Learn hands on.
Online labs.
Test will take 2 hours.
Find out the error in configuration.
Learn hands on.
Online labs.
Test will take 2 hours.
Explain the role and function of network components
1.1.a Routers
1.1.b Layer 2 and Layer 3 switches
1.1.c Next-generation firewalls and IPS
1.1.d Access points
1.1.e Controllers (Cisco DNA Center and WLC)
1.1.f Endpoints
1.1.g Servers
1.1.h PoE
simulated lab (sim) – a lab scenario where you can access and configure the devices. You job is to fix the problem by reconfiguring the devices:
Using the OSI model to discuss networking concepts has the following advantages:
Provides a common language or reference point between network professionals
Divides networking tasks into logical layers for easier comprehension
Allows specialization of features at different levels
Aids in troubleshooting
Promotes standards interoperability between networks and devices
Provides modularity in networking features (developers can change features without changing the entire approach)
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