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In Cisco networking, an access list (or ACL) is a set of rules that defines what traffic is allowed or denied to pass through a network device, such as a router or switch. Access lists are used to filter and control network traffic based on criteria such as source and destination IP addresses, protocols, and ports. Access lists can be applied to inbound or outbound traffic on an interface, and they can be used to permit or deny traffic.
Access lists are identified by a number, which can range from 1 to 199 for standard IPv4 access lists, 100 to 199 for extended IPv4 access lists, 2000 to 2699 for standard IPv6 access lists, and 2700 to 2799 for extended IPv6 access lists.
There are two types of access lists in Cisco networking:
Standard access lists: These access lists match traffic based on the source IP address only. They are identified by a number from 1 to 99 (IPv4) or 1300 to 1999 (IPv6).
Extended access lists: These access lists match traffic based on multiple criteria, such as source and destination IP addresses, protocols, and ports. They are identified by a number from 100 to 199 (IPv4) or 2000 to 2699 (IPv6).
Check this video on Access-Lists (Standard and Extended): CCNA Training
Network Assurance is the process of ensuring that a network is functioning properly, reliably, and securely. It involves a range of activities that help network administrators to proactively monitor, analyze, and optimize their networks for better performance.
Some of the key components of Network Assurance include:
Network Monitoring: This involves continuously monitoring the network for potential issues, such as traffic congestion, packet loss, and device failures. Network administrators use various tools, such as network monitoring software, to monitor network traffic and detect any anomalies.
Network Analysis: This involves analyzing network data to identify patterns and trends that could help improve network performance. Network administrators use various tools, such as network analyzers, to collect and analyze network data.
Network Optimization: This involves optimizing network configurations to improve network performance and security. Network administrators use various tools, such as network management software, to configure and optimize network devices, such as routers and switches.
Network Security: This involves implementing measures to protect the network from unauthorized access, malware, and other security threats. Network administrators use various tools, such as firewalls and intrusion detection systems, to protect the network.
Overall, Network Assurance is an essential component, as it helps network administrators to ensure that their networks are reliable, secure, and functioning at optimal levels. By proactively monitoring, analyzing, and optimizing their networks, network administrators can reduce downtime, improve user experience, and increase network efficiency.
Check this complete article at Network Assurance: Contents (tutorialsweb.com)
In Cisco's CCNA (Cisco Certified Network Associate) certification program, the Network Access domain covers the basic concepts and technologies related to network access control, including VLANs, Ethernet switching, and wireless LANs.
Here's an overview of the key topics covered in the Network Access domain of the CCNA program:
VLANs: This topic covers Virtual Local Area Networks (VLANs), which allow a single physical switch to be divided into multiple logical switches. VLANs can be used to separate traffic based on department, function, or security level, and can help reduce the size of broadcast domains.
Spanning Tree Protocol (STP): This topic covers STP, a protocol used to prevent loops in Ethernet networks. STP elects a root bridge and disables certain links to prevent loops and ensure a single path through the network.
EtherChannel: This topic covers EtherChannel, a technique used to increase the bandwidth and redundancy of links between switches. EtherChannel groups multiple physical links into a single logical link, and can improve network performance and resilience.
Wireless LANs:This topic covers the basic concepts and technologies related to wireless LANs, including wireless standards, frequency bands, and security mechanisms. It also covers the different types of wireless devices, such as access points and wireless clients.
Network Security: This topic covers the basic principles and technologies of network security, including access control lists (ACLs), port security, and device hardening. It also covers the different types of attacks and threats that can affect network security, and how to prevent and mitigate them.
Overall, the Network Access domain is an important part of the CCNA program, as it covers the foundational concepts and technologies of network access control. By mastering these topics, network administrators can ensure that their networks are secure, efficient, and reliable.
Check out complete article at CCNA Network Access : Contents (tutorialsweb.com)
Tutorialsweb.com, a leading site for professional articles, offering JNCIA cram notes for free. Tutorialsweb.com revised their JNCIA Exam study guide to reflect the most recent exam objectives of JNCIA-Junos (JN0-104) certification exam.
JNCIA-Junos (JN0-104) Exam Objectives
1. Networking Fundamentals
2. Junos OS Fundamentals
3. User Interfaces
4. Configuration Basics
5. Operational Monitoring and Maintenance
6. Routing Fundamentals
7. Routing Policy and Firewall Filters
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