This lesson focuses on static NAT configuration on Cisco IOS devices. NAT (network address translation) is an important topic for the CCNA exam and for network engineering. NAT is used to translate the source and/or destination IP address of a packet to a different IP address. NAT is covered in Section 4 of the CCNA […]
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This lesson focuses on how to configure SSH on Cisco devices. The Secure Shell Protocol (SSH) is a cryptographic network protocol used to operate network services securely over unsecured networks. The most notable applications of SSH are remote login and command-line execution. SSH is mentioned in the CCNA exam topics list in two places. First,
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This lesson covers DHCP, Dynamic Host Configuration Protocol. DHCP is mentioned in the CCNA exam blueprint in Section 4.0 IP Services. Subsection 4.3 states that you should be able to “Explain the role of DHCP and DNS within the network”, and subsection 4.6 says you should be able to “Configure and verify DHCP client and
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The DNS (Domain Name System) protocol makes it easy for humans to use the Internet by translating domain names into IP addresses. This means that we can type in a human-readable address like www.google.com instead of a complex IP address like 172.217.0.142. DNS is mentioned in the CCNA exam topics list in Section 4, IP
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This is Part 2 of 2 of ACLs study notes for the CCNA. This lesson, ACLs Part 2, focuses on how to configure extended ACLs on Cisco routers. The previous lesson, ACLs Part 1, focused on how to configure standard ACLs on Cisco routers. Everything covered in ACLs Part 1 about the purpose of ACLs, how
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This is Part 1 of 2 of ACLs study notes for the CCNA. The CCNA exam topics list mentions ACLs (Access Control Lists) in Section 5, Security Fundamentals, subsection 5.6, which says you must be able to “configure and verify access control lists”. This subsection refers to IPv4 ACLs. This lesson focuses on how to
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Let’s get started with Wireshark. This post constitutes a short Wireshark demo to show TCP and UDP in action in a real network. This post complements the CCNA lesson on TCP and UDP: CCNA 200-301 TCP & UDP study notes (Comparing TCP to UDP). This post is part of my CCNA 200-301 study notes. For a
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This lesson covers two important L4 protocols, TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) – how they function and their characteristics. TCP and UDP are mentioned in Section 1.0 Network Fundamentals, subsection 1.5, of the CCNA exam topics list, which says you must be able to “Compare TCP to UDP”. First, the basic
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Coursera Deep Learning Specialization quiz answers to all 5 specialization courses (1-5): Course 1 Neural Networks And Deep Learning quiz answers Course 2 Improving Deep Neural Networks: Hyperparameter Tuning, Regularization And Optimization quiz answers Course 3 Structuring Machine Learning Projects quiz answers Course 4 Convolutional Neural Networks quiz answers Course 5 Sequence Models quiz answers
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This is the third and final installment of my study notes on the topic of OSPF for the CCNA. We begin with some notes on loopback interfaces. Configuring a loopback interface on a router provides an interface with an IP address that is always up and can consistently be used to identify and reach the
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