Oluwasesan Joshua

Top 09 Interview Questions with Answers for Network Engineer: 1. What is a VLAN? - A VLAN (Virtual Local Area Network) is a logical grouping of devices within a network that communicate with each other as if they are on the same physical network, regardless of their physical location. 2. Explain the difference between a hub, a switch, and a router. - A hub operates at the physical layer of the OSI model and simply forwards data to all connected devices. A switch operates at the data link layer and forwards data only to the intended recipient. A router operates at the network layer and forwards data between different networks based on IP addresses. 3. What is ARP and how does it work? - ARP (Address Resolution Protocol) is used to map an IP address to a MAC address on a local network. When a device wants to communicate with another device on the same network, it broadcasts an ARP request asking "Who has this IP address?" The device with that IP address responds with its MAC address. 4. Explain the purpose of a subnet mask. - A subnet mask is used to divide an IP address into network and host portions. It determines which part of the IP address represents the network and which part represents the host. 5. What is DHCP and how does it work? - DHCP (Dynamic Host Configuration Protocol) is used to automatically assign IP addresses and other network configuration parameters to devices on a network. It works by having a DHCP server allocate IP addresses from a predefined range to requesting devices. 6. What is BGP and how does it differ from other routing protocols? - BGP (Border Gateway Protocol) is an exterior gateway protocol used for routing between autonomous systems on the Internet. Unlike interior gateway protocols such as OSPF and EIGRP, BGP focuses on policy-based routing and operates on TCP port 179. 7. Explain the purpose of MPLS (Multiprotocol Label Switching). - MPLS is a protocol used in high-performance telecommunications networks to speed up the forwarding of network packets. It adds a label to packets, allowing routers to make forwarding decisions based on the label rather than the destination IP address. 8. What is the purpose of VLAN trunking? - VLAN trunking is used to carry traffic from multiple VLANs over a single physical link between switches. It allows for the efficient use of network bandwidth and facilitates network segmentation and isolation. 9. Describe the difference between static routing and dynamic routing. - Static routing involves manually configuring routes on network devices, while dynamic routing protocols automatically learn and update routing tables based on network topology changes.

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As cloud adoption accelerates, the need to understand architectural patterns that drive scalable, secure, and efficient cloud solutions becomes critical. This resource is a treasure trove for anyone looking to deepen their understanding of cloud computing patterns—from resilient architectures to multi-cloud strategies. But here’s the question: Are we, as industry professionals, fully leveraging these patterns to build future-ready infrastructures, or are we still trapped in legacy mindsets? Explore more and rethink how we approach cloud architecture: https://lnkd.in/ds6b6-Pe #CloudComputing #CloudArchitecture #DevOps #Innovation #MultiCloud #Scalability

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🚨 Important Update for 350-401 ENCOR Exam Takers! 🚨 The 350-401 ENCOR exam is getting a new format! All lab items will now appear at the start of the exam, meaning candidates will dive right into performance-based tasks within the first hour. The second hour will be dedicated to multiple-choice questions.

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https://lnkd.in/gDqK9YPK Are you preparing for a Network Technician interview? In this video, I roleplay an interview scenario to help you prepare for your next interview! Watch me as I go through key questions and expert answers that cover technical skills, problem-solving abilities, and industry knowledge.

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How to scare network engineers

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Hello... #Network #Engineer #BGP #Protocol For Network Engineer Interview. When explaining BGP in an interview, it's important to cover the key concepts in a clear and concise manner. 1. Introduction to BGP: - BGP, or Border Gateway Protocol, is a exterior gateway protocol designed to exchange routing information between different autonomous systems (ASes) on the internet. 2. Types of BGP: ● External BGP (eBGP): Used for communication between different autonomous systems. ● Internal BGP (iBGP): Used for communication within the same autonomous system. 3. BGP Attributes: ● BGP routes come with various attributes that help determine the best path to a destination. Key attributes include AS-PATH, NEXT-HOP, LOCAL_PREF, MED (Multi-Exit Discriminator), and more. 4. Route Selection: ● BGP uses its attributes to select the best path to a destination. For example, it prefers the path with the highest LOCAL_PREF, shortest AS-PATH, lowest MED, etc. 5. Scalability: ● BGP is designed to be highly scalable and capable of handling the vast number of routes on the internet. 6. Reliability and Stability: ● BGP uses TCP (port 179) for reliable transport of its routing information, ensuring that routes are accurately propagated and updated. 7. Policy Control: ● BGP allows for extensive policy control over route advertisement and selection, enabling network administrators to influence routing decisions based on business or performance considerations. 8. BGP Peering: ● BGP routers form a peering relationship through a process called BGP peering. Peers exchange routing information to update their routing tables. 9. Convergence and Update Mechanism: ● BGP converges slowly compared to other protocols like OSPF or EIGRP, but it provides mechanisms for incremental updates, reducing the amount of data that needs to be exchanged during normal operations. 10. Security: ● BGP includes mechanisms such as prefix filtering, route maps, and authentication to enhance security and prevent route hijacking or misconfigurations. ■ Example of How to Summarize BGP: "BGP, or Border Gateway Protocol, is the protocol that manages how packets are routed across the internet by exchanging routing information between different autonomous systems (ASes). It operates over TCP and uses a variety of attributes to determine the best path to a destination. BGP is highly scalable and customizable, allowing network administrators to set policies that influence routing decisions. It’s essential for the stability and efficiency of the global internet routing infrastructure." #bgp #protocol #Cisco #ccna #ccnp #learning #networks #training

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If a disaster occurred at your office and all of your data was wiped out, do you have a recovery plan in place that could restore your data and get your business back up and running by the next business day? If not, this should be a priority. You never know when disaster could strike, so it’s important to be prepared because downtime costs money. Luckily, data backup is an easy fix. When you work with us, we’ll make sure all of your data is stored off-site with regular backups. That way, if something does go wrong, we can help you fix it quickly. 📲Book a FREE 10-Minute Discovery Call with our team of experts who can help you find out exactly what you need to be prepared for any disaster here - https://lnkd.in/g4cxsVfv

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SD-WAN—the modern solution reshaping enterprise networking! We are inte-QT (formerly bits & BYTE GLOBAL) and provide the SD-WAN solution across the world. These are SD-WAN components, where you can sit on top and manage everything. ! 1. vManage (management): vManage configure and manage the entire SD-WAN solution and give alerts where there are outages or events. 2. vSmart: vSmart is the control plane of the architecture. vSmart controllers advertise routes, security, and policy information. Cisco SD-WAN uses the proprietary Overlay Management Protocol (OMP) for this. vSmart implements the policies that you configure through vManage. 3. vBond: vBond is the conductor. It arranges connectivity and authenticates vSmart controllers and vEdge routers. It provides instructions to vEdge routers on how and where to connect to vSmart and vManage controllers. 4. vAnalytics: One analytics service that is optional is vAnalytics. It provides you with a complete SD-WAN view of your infrastructure and applications. #inteqt #sdwan #cisco #weareinteqt #viptelasdwan #networking #NSOC #L3solution #security #ccnp

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Giveaway! Premium official Cisco certification ebook and practice exams for either CCNP Enterprise, CCNA, or CCST exams. Comment CCST, CCNA, or CCNP to enter. #tech #certs #CCNA #CCNP #CCST #Cisco #upskill #networkengineering #ArtofNetworkEngineering. This is over now. Announcing the winner soon.

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☑️Free resources ☑️eBook: Network Security Groups in Azure Repost☑️Connect 🤝 Like 👍 Share Credit: Mustafa Toroman #linkdin #linkedinfamily #itadviser #azure #azurecloudengineer #cloudcomputing #growth #engineer #enginners #engineering #technology #growth #letsconnect #opentonewconnections #systemadministrator #networkenginner

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☑️Free resources ☑️eBook: Network Security Groups in Azure Repost☑️Connect 🤝 Like 👍 Share Credit: Mustafa Toroman #linkdin #linkedinfamily #itadviser #azure #azurecloudengineer #cloudcomputing #growth #engineer #enginners #engineering #technology #growth #letsconnect #opentonewconnections #systemadministrator #networkenginner

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Hello 👋 #Network #Engineers Here are most asked scenario-based questions and answers for a network engineer: 1. Scenario: A user is experiencing slow network speeds. Question: What steps would you take to troubleshoot the issue? Answer: • Check the user's connection: Use network diagnostic tools like "ping" or "tracert" to check for latency or packet loss. • Check bandwidth utilization: Look for any bandwidth-hogging applications using "netflow" or "Wireshark". • Evaluate network device health: Ensure the network devices (switches, routers) are operating properly and not overloaded. • Check for network congestion: Analyze network traffic to identify congestion points and check if Quality of Service (QoS) policies are applied correctly. • Test with different devices: Confirm if the issue is limited to one user or more. If widespread, check the overall network performance and external connections. 2. Scenario: You need to design a network that requires both redundancy and high availability. Question: How would you achieve this? Answer: • Redundant links: Implement multiple redundant links using technologies like EtherChannel or Link Aggregation Control Protocol (LACP) for automatic failover. • Redundant devices: Deploy multiple switches and routers in a dual-core or dual-homed topology to prevent a single point of failure. • Use dynamic routing protocols: Configure routing protocols like OSPF or BGP that automatically reroute traffic in case of a link or device failure. • High Availability (HA) protocols: Implement protocols like Hot Standby Router Protocol (HSRP) or Virtual Router Redundancy Protocol (VRRP) to ensure seamless failover between routers. • Monitor and test: Continuously monitor network health and regularly test failover mechanisms to ensure high availability. 3. Scenario: A network segment is constantly experiencing outages, but only during peak traffic times. Question: What could be causing this, and how would you resolve it? Answer: • Overloaded devices: The devices in the network segment (routers, switches) could be reaching their capacity. Check CPU and memory utilization during peak times. • Congested links: The network links may not have enough bandwidth to handle the traffic. Perform a bandwidth analysis and consider upgrading the link or applying traffic shaping. • Broadcast storms: Excessive broadcasts during peak times can overload the network. Use `Wireshark` or `NetFlow` to detect any abnormal traffic patterns and implement VLANs or storm control to reduce broadcast traffic. • Misconfigured QoS: If Quality of Service (QoS) policies are not properly configured, critical traffic might not get prioritized, leading to congestion. Review and adjust QoS policies. • Faulty cabling or hardware: Test the physical layer for issues such as failing cables or ports that may only manifest under high load.

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Why CCIE Guy is So Angry or Which Certificated Do You Have or Interest🛜 The Intense Journey from CCNP to CCIE 🍔 The journey from CCNP to CCIE is no walk in the park! This illustration humorously captures the CCIE candidate's struggle, balancing multiple demands and intense study, akin to a chef juggling numerous ingredients. The frustration and dedication are part of the process that makes the CCIE certification so highly respected. Are you on this path too? Which certification are you pursuing or interested in? #CCNP #CCIE #CiscoCertification #Networking #TechJourney #StudyMotivation #ITCertifications #NetworkEngineer #TechHumor #CiscoSkills #CertificationJourney #TechLife #NetworkingProfessionals #CCNP #CCIE #CiscoCertification #Networking #effecloud

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BGP STATES

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CCIE ROUTING and Switching. Bridging the gap between CCNP and CCIE.

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Mastering network security in Telecommunications Engineering can be achieved through acquiring certifications, building educational knowledge, gaining field experience, and maintaining a commitment to ongoing learning and understanding of industry trends.

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Fortigate troubleshooting commands

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All the underwater fiber optic cables that provide the internet throughout the world

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