6.1.a [i] Console and VTY
The console port on the router is an EIA/ TIA-232 asynchronous, serial connection with no flow control and an RJ-45 connector. The console port is used to access the router and is located on the front panel of the Route Processor (RP).
Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 5502-5503). . Kindle Edition.
6.1.a [ii] telnet, HTTP, HTTPS, SSH, SCP
You can use the SSH server to enable an SSH client to make a secure, encrypted connection to a Cisco IOS device. SSH uses strong encryption for authentication. The SSH server in the Cisco IOS software can interoperate with publicly and commercially available SSH clients. There are three steps that need to be taken to enable SSH, i.e. generate a crypto key, configure a domain name, and configure VTY line( s) to use transport SSH (using transport input command).
The user authentication mechanisms supported for SSH are RADIUS, TACACS +, and the use of locally stored usernames and passwords. The behavior of SCP is similar to that of remote copy (rcp), which comes from the Berkeley r-tools suite, except that SCP relies on SSH for security. In addition, SCP requires that authentication, authorization, and accounting (AAA) authorization be configured so the router can determine whether the user has the correct privilege level.
The HTTP 1.1 Web Server and Client feature provides a consistent interface for users and applications by implementing support for HTTP 1.1 in Cisco IOS software-based devices. When combined with the HTTPS feature, the HTTP 1.1 Web Server and Client feature provides a complete, secure solution for HTTP services between Cisco devices.
Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 5509-5515). . Kindle Edition.
6.1.a [iii] [T]FTP
You can configure a router to serve as a RARP or TFTP server to reduce costs and time delays in your network while allowing you to use your router for its regular functions.
Typically, a router that is configured as a TFTP server provides other routers with system image or router configuration files from its Flash memory. You can also configure the router to respond to other types of service requests, such as requests.
To enable TFTP server operation, use the following commands, beginning in privileged EXEC mode:
Router( config)# tftp-server flash [partition-number:] filename1[ alias filename2] [access-list-number]
You configure a router to transfer files between systems on the network using the File Transfer Protocol (FTP). With the Cisco IOS implementation of FTP, you can set the following FTP characteristics:
● Passive-mode FTP
● User name
● IP address
Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 5519-5531). . Kindle Edition.