Start Your Network Foundations with CCNA Robert Piper NetCom Learning
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AGENDA Introduction to Networks Components of Network IP/LAN/LAN Components Role of Router Introduction to Syslog Cisco Enterprise Architectural Model Network Device Security overview
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INTRODUCTION TO NETWORK
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CISCO ENTERPRISE ARCHITECTURAL MODEL
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COMPONENTS OF NETWORK
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INTERNET PROTOCOL • IP has these characteristics: • Operates at the internet layer of the TCP/IP stack • Connectionless protocol • Packets treated independently • Hierarchical addressing • Best-effort delivery • No data-recovery features • Media-independent • Two variants: IPv4 and IP version 6 (IPv6)
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LOCAL AREA NETWORK A LAN is a network of endpoints and other components that are locate( relatively close together in a limited area.
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LAN COMPONENTS Hosts: • PCs • Servers • IP phones • Printers Mobile phones • Interconnections: • Network interface cards (NICs) • Network media
Network devices: • Ethernet Switches • Routers • Access points Protocols: • Ethernet • IP • Address Resolution Protocol (ARP) • Dynamic Host Configuration Protocol (DHCP)
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LAN COMPONENTS
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ROLE OF ROUTER • Routers are required to reach hosts that are not in the local network. • Routers use a routing table to route between networks.
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ROLE OF A ROUTER
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IPV4 ROUTING TABLE EXAMPLE
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TROUBLESHOOTING METHODS The guiding principles determine how you move through the phases of the troubleshooting process.
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TROUBLESHOOTING METHOD Top-Down
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Bottom-Up
Divide and Conquer
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INTRODUCING SYSLOG Characteristics of syslog are as follows: • Syslog is a protocol that allows a network device to send event notification messages across IP networks to event message collectors.
You can configure a device so that it generates a syslog message and forwards it to various destinations: •
Logging buffer
• Console line • Terminal lines • Syslog server
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CHARACTERISTICS OF WICKED PROBLEM SNMP is a management protocol that supports message exchange: •
SNMP manager: Polls agents on the network and displays information.
• SNMP agent: Stores information and responds to manager requests. It also generates traps which are unsolicited messages. You can set thresholds to trigger a trap notification process when values are exceeded. Management Information Base (MIB): • Contains a database of objects (information variables).
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CISCO ENTERPRISE ARCHITECTURAL MODEL
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CISCO INTEGRATED FILE SYSTEM AND DEVICES
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CISCO INTEGRATED FILE SYSTEM AND DEVICES
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STAGES OF ROUTER POWER-ON BOOT SEQUENCE Stages and router components that are used in the router power-on boot sequence:
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CISCO ENTERPRISE ARCHITECTURAL MODEL
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NETWORK DEVICE SECURITY OVERVIEW Common threats when using network devices: Remote access threats • Unauthorized remote access Local access and physical threats • Damage to equipment • Password recovery • Device theft Environmental threats • Extreme temperature • High humidity
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Electrical threats •
Insufficient power supply voltage
• Voltage spikes Maintenance threats • Improper handling • Poor cabling • Inadequate labeling
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NETWORK DEVICE SECURITY OVERVIEW Methods used to
Password policy consists
Password alternatives are:
obtain passwords that
of:
• Multi-factor authentication
can be applied either
Password complexity
• Digital certificates
online or offline:
Password length
• Biometrics
• Guessing Brute
Large character set
force • Dictionary attacks
• Password management • Storage • Protection • Password changes
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RECORDED WEBINAR VIDEO
To watch the recorded webinar video for live demos, please access the link: https://bit.ly/3zpPWVH
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