Meta tags:
Headings (most frequently used words):
tutorial, ccna, security, for, forwarding, router, training, puppet, port, 200, 301, qos, network, phb, behavior, hop, resources, per, premium, concepts, on, key, sdn, practice, labs, lab, challenges, what, is, how, cisco, makes, decision, configure, ssh, remote, access, tutorials, membership,
Text of the page (most frequently used words):
the (81), #tutorial (72), #questions (41), and (35), #ccna (27), #with (20), router (20), #security (20), #traffic (19), lab (19), #network (18), access (18), #this (17), for (15), port (13), protocol (12), website (12), that (11), packets (11), are (11), can (11), #puppet (11), all (11), cisco (11), more (10), configure (9), labs (9), which (9), challenge (9), device (9), knowledge (9), example (8), interface (8), packet (8), priority (8), practice (8), stp (7), address (7), ospf (7), shaping (7), qos (7), phb (7), sdn (7), forwarding (7), map (6), how (6), ssh (6), troubleshooting (6), challenges (6), decision (6), each (6), read (6), switch (6), when (6), vlan (6), policy (6), them (6), nat (6), routing (6), below (6), devices (6), vtp (6), mac (6), our (5), master (5), only (5), called (5), have (5), wireless (5), but (5), service (5), list (5), remote (5), based (5), will (5), tutorials (5), gns3 (5), eigrp (5), other (5), subnetting (5), tcp (5), networking (5), learn (5), class (5), etherchannel (5), use (5), rate (4), header (4), trunking (4), per (4), hop (4), addresses (4), 100 (4), key (4), concepts (4), data (4), makes (4), what (4), queuing (4), out (4), control (4), secure (4), classification_http (4), you (4), dscp (4), architecture (4), basic (4), many (4), marking (4), hsrp (4), spanning (4), tree (4), marking_http (4), aaa (4), actions (4), from (4), checking (4), process (4), simple (4), one (4), dhcp (4), just (3), policing (3), where (3), specific (3), some (3), into (3), these (3), congestion (3), interfaces (3), codes (3), they (3), table (3), needs (3), most (3), excess (3), agent (3), best (3), your (3), made (3), shown (3), model (3), automation (3), mark (3), fastethernet0 (3), destination (3), field (3), drag (3), drop (3), like (3), ipv6 (3), group (3), connect (3), udp (3), outbound (3), behavior (3), chef (3), ansible (3), classification (3), training (3), layer (3), match (3), syslog (3), such (2), take (2), set (2), its (2), attempts (2), time (2), transmission (2), allows (2), phbs (2), way (2), ensuring (2), telnet (2), know (2), quality (2), services (2), vulnerability (2), codepoints (2), uses (2), any (2), first (2), type (2), discarding (2), created (2), af21 (2), delay (2), between (2), before (2), low (2), includes (2), doors (2), sent (2), windows (2), queue (2), may (2), specified (2), limits (2), world (2), involves (2), considered (2), configuring (2), message (2), applied (2), value (2), matching (2), named (2), system (2), apply (2), anyone (2), method (2), important (2), private (2), easier (2), house (2), switches (2), making (2), their (2), popular (2), while (2), different (2), radius (2), check (2), rapid (2), translation (2), config (2), site (2), topology (2), nodes (2), technologies (2), virtual (2), see (2), anything (2), standby (2), experience (2), resources (2), server (2), client (2), rstp (2), local (2), fundamentals (2), election (2), intervlan (2), cli (2), management (2), snmp (2), wan (2), root (2), line (2), command (2), json (2), tacacs (2), sequence (2), boot (2), osi (2), easy (2), threats (2), features (2), area (2), centralized (2), updated (2), clients (2), tasks (2), place (2), distributed (2), stored (2), route (2), send (2), design (2), need (2), controller (2), center (2), tool (2), about (2), figure (2), must (2), make (2), communicate (2), hot (2), even, concept, common, certain, typically, bricks, stones, concrete, related, blocks, assist, very, grasping, strong, listed, components, exits, exam, prioritize, summarized, here, categorized, tos, application, programmability, criteria, materials, gateway, groups, let, load, routers, static, differentiated, emulators, change, discard, goal, provide, amount, practical, gain, professionals, individuals, help, glbp, types, behaviors, embedded, passwords, preconfigured, contiguous, point, require, balancing, enters, connectivity, until, defines, code, levels, giving, theft, shell, going, keypair, public, rsa, encryption, also, authentication, online, accept, keep, understand, main, idea, creating, words, explore, creates, architectures, king, arrive, username, build, user, contains, details, session, grabs, choose, remotely, person, routes, bad, reaches, unencrypted, determines, contrast, unsecured, using, safe, whole, cannot, else, refers, work, cybersecurity, correctly, chimney, tools, hand, too, password, flaw, means, keys, come, owners, without, easily, used, weakness, messages, kingdom, resided, information, keeping, things, centralizes, internet, computers, traditional, plane, own, implementation, therefore, digital, via, vulnerabilities, compromise, attackers, exploited, could, operation, contact, preventing, categorizing, performing, fact, host, certification, another, besides, request, simply, something, various, instructions, bits, dictate, written, installed, node, comprises, built, required, performs, necessary, was, seconds, sending, meaning, state, enabled, default, threat, mitigate, down, shutting, warning, incoming, configured, predefined, unauthorized, recognized, authorized, restricts, association, associate, administrators, blocked, pulls, 1800, through, devnet, dna, vpn, miscellaneous, share, simulators, free, encor, ensdwi, enarsi, dai, ccie, provider, collaboration, top, 2023, 2014, copyright, privacy, disclaimer, dns, ntp, every, sign, after, regularly, deployment, pull, membership, premium, member, become, find, mpls, cdp, relay, frame, rip, 301, 200, tips, faqs, virtualization, cloud, lldp, potentially, wall, inside, transmitted, journey, there, leaving, entering, classified, marks, activate, output, counterparts, high, consuming, ensures, wfq, fair, weighted, algorithms, utilizing, scheduling, holding, ones, repeated, efficient, manage, matches, kind, determine, examine, does, thing, receiving, permit, permits, precedence, classify, either, reading, should, level, changing, standard, possible, source, close, once, higher, red, socket, difference, released, buffer, timely, enter, little, again, buffered, dropped, usually, shows, conform, above, connected, ports, ethernet, controlling, enhances, feature, risk, posing, controlled, desired, detection, discarded, early, random, mechanisms, accommodate, insufficient, bandwidth, occurs, lower, marked, exceeding, profile, predetermined, enforcing, monitoring, happens, buffering, applicable, bursts, smooth, approach, gentle, topics,
Text of the page (random words):
ccna training ccna tutorials practice labs lab challenges in ccna knowledge we have many tutorials and practice labs on our site to assist you in grasping the concept of the ccna exam we have summarized them here in one place and categorized them into specific topics making it easier for you to learn ccna tutorials 1 0 network fundamentals osi model tutorial tcp and udp tutorial wan tutorial cisco command line interface cli cisco router boot sequence tutorial subnetting tutorial subnetting made easy wireless tutorial ipv6 tutorial 2 0 network access layer 2 technologies related virtual local area network vlan tutorial intervlan routing tutorial spanning tree protocol stp tutorial stp root port election tutorial rapid spanning tree protocol rstp tutorial vlan trunking protocol vtp tutorial etherchannel tutorial 3 0 ip connectivity how a router makes a forwarding decision ospf tutorial eigrp tutorial hot standby router protocol hsrp tutorial gateway load balancing protocol glbp tutorial 4 0 ip services dhcp tutorial simple network management protocol snmp tutorial syslog tutorial network address translation nat tutorial forwarding per hop behavior phb for qos tutorial configure ssh for remote access on cisco router 5 0 security fundamentals key security concepts tutorial access list tutorial layer 2 threats and security features aaa tacacs and radius tutorial port security tutorial 6 0 automation and programmability what is sdn puppet tutorial chef tutorial ansible tutorial json tutorial ccna practice labs practice labs help individuals and professionals gain practical experience with networking technologies by configuring routers switches on the emulators ccna practice labs configure nat gns3 lab configure static route gns3 lab configure cisco router passwords gns3 lab eigrp gns3 lab ccna lab challenges lab challenges require you to configure or troubleshooting preconfigured labs ccna lab challenges troubleshooting access list simple troubleshooting dhcp simple config lab challenge 1 nat config lab challenge 2 vtp checking lab challenge 1 ospf checking lab challenge 2 basic checking lab challenge 3 vtp stp etherchannel checking lab challenge 4 vtp stp etherchannel nat ospf hsrp troubleshooting lab challenge 1 ospf troubleshooting lab challenge 2 eigrp troubleshooting lab challenge 3 switch basic what is sdn in ccna knowledge most traditional devices use a distributed architecture in which each control plane is resided in a networking device each device will make its own decision therefore they need to communicate with each other via messages to work correctly in contrast to distributed architecture centralized or controller based architectures centralizes the control of networking devices into one device called sdn controller this is also the main idea when creating sdn in other words sdn creates a king to control the whole networking kingdom read more how a router makes a forwarding decision in ccna knowledge we all know when a packet reaches a router interface the router will send the packet to the destination but how can a router determines which route is the best to use to send the packet in this tutorial we will learn more about how a router makes the forwarding decision to make the routing decision the router must first build a table which contains all the best routes when the packets arrive the router just needs to check this table to choose the best match this is called the routing table read more configure ssh for remote access on cisco router in ccna knowledge one of the most popular way to access a cisco router remotely is using telnet but it is an unsecured method as the data is sent unencrypted if a bad person grabs data from a telnet session he can see details like a user s username and password giving them access to your router ssh secure shell is a secure method for remote access as it includes authentication and encryption to do this it uses a rsa public private keypair in this tutorial we are going to learn how to configure ssh for r1 to accept remote ssh access with the topology below read more key security concepts tutorial in ccna knowledge in the digital world where we use computers and the internet for many things keeping our information safe is one of the most important tasks this tutorial will explore some of the popular and important security concepts making it easier for us to understand and use them to keep our online world secure and private let s take an example of a common house which is typically made from bricks stones or concrete blocks they are very strong materials which are considered to be secure from theft but a house cannot be used easily without doors and windows so that the owners can come in and go out with keys but it means anyone else can too with some hand tools the doors and windows and chimney are considered vulnerabilities in cybersecurity a vulnerability refers to a weakness or flaw in a system s design implementation or operation that could be exploited by attackers to compromise the system s security read more forwarding per hop behavior phb for qos tutorial in ccna knowledge quality of service qos is a tool that allows our network to prioritize certain types of traffic qos defines the actions that a device can apply to a message between the time it enters the device until it exits the device these actions are called per hop behaviors phbs with phbs we can discard delay or even change the header field of each packet the goal of a phb is to provide a specified amount of network resources to a class of traffic on a contiguous network phb uses a set of codepoints to mark packets with different levels of priority these codepoints are embedded in the differentiated services code point dscp field of the type of service tos field of the ip header the key components of phb are listed below classification when receiving a packet the first thing a networking device does is to examine the packet s header to determine what kind of data is inside this is called classification and involves categorizing network traffic into different groups based on specific criteria like ip address protocol port or application type an example of classification is shown below class map match all classification_http match access group 100 access list 100 permit tcp any any eq 80 in this example we have created a class map named classification_http that matches all traffic matching access group 100 access group 100 permits tcp traffic with destination port 80 marking a packet can be classified when entering or leaving a device but there may be many other devices on its journey to the destination and this repeated process is time consuming a more efficient way is to classify the packets once as close to the source as possible and mark them to a qos standard this is called marking which is the process of changing the packet s header so that other devices know which level quality of service should be applied to the packets by just reading the marking with ip packets we can mark with either a precedence or dscp value an example of marking is shown below policy map marking_http class classification_http set dscp af21 in this example we have created a policy map named marking_http that marks all traffic matching the classification_http class with dscp value of af21 apply activate the policy map to an interface interface fastethernet0 1 service policy output marking_http in this example we have applied the marking_http policy map to fastethernet0 1 interface for outbound traffic queuing the process of holding packets in a queue and scheduling their transmission based on priority utilizing algorithms such as weighted fair queuing wfq this process ensures high priority packets are transmitted before their low priority counterparts an example of configuring queuing is shown below interface fastethernet0 1 priority queue out congestion occurs when network bandwidth is insufficient to accommodate all traffic phb includes mechanisms like random early detection red to manage congestion by discarding low priority packets before higher priority ones policing involves monitoring network traffic and enforcing predetermined traffic rate limits packets exceeding specified rate limits may be discarded or marked with a lower priority shaping shaping is the control of the rate at which packets enter the network preventing congestion and ensuring timely transmission of all packets excess traffic is stored in a buffer and released at a controlled rate shaping the traffic to conform to the desired profile shaping is a more gentle approach that attempts to smooth out bursts of traffic traffic shaping is applicable only on outbound interfaces as buffering and queuing happens only on outbound interfaces the figure above shows the difference between policing and shaping with traffic policing excess traffic is usually dropped while with traffic shaping excess traffic is buffered and sent again with a little delay port security tutorial in ccna knowledge by default all interfaces on a cisco switch are in an enabled state meaning that anyone can potentially connect to your network through a wall socket posing a security risk port security is a feature that enhances the security of cisco switches by controlling access to ethernet ports based on the mac addresses of connected devices to address this vulnerability port security allows network administrators to associate only specific mac addresses with each switch port this association restricts access to the interface ensuring that only authorized devices with recognized mac addresses can use it if an unauthorized device attempts to connect you can configure the switch to take predefined actions such as discarding the incoming traffic sending a warning message or shutting down the port to mitigate the security threat in the figure below only host with mac address of aaa just for example in fact the mac address must be 48 bits was configured to connect to the switch port while other mac addresses are blocked read more puppet tutorial in ccna knowledge besides ansible and chef puppet is another automation tool in ccna certification so in this tutorial we will learn about it puppet is built on server client architecture which comprises a master centralized server and some many nodes clients in each node a puppet agent is installed to communicate with the puppet master puppet master is the place where all puppet codes are written and stored these codes dictate the instructions for performing various tasks for the client if the clients need something they simply request them puppet is based on a pull deployment model where the nodes check in regularly after every 1800 seconds with the master to see if anything needs to be updated in the agent if anything needs to be updated the agent pulls the necessary puppet codes from the master and performs required actions read more premium membership become a member to learn all the tutorials practice all questions and labs on our site find out more or sign in ccna training ccna knowledge ccna tutorials practice labs lab challenges what is sdn how a router makes a forwarding decision configure ssh for remote access on cisco router key security concepts tutorial forwarding per hop behavior phb for qos tutorial port security tutorial puppet tutorial chef tutorial ansible tutorial json tutorial layer 2 threats and security features aaa tacacs and radius tutorial stp root port election tutorial basic mpls tutorial tcp and udp tutorial wan tutorial dhcp tutorial simple network management protocol snmp tutorial syslog tutorial etherchannel tutorial hot standby router protocol hsrp tutorial intervlan routing tutorial cisco command line interface cli cisco router boot sequence tutorial osi model tutorial subnetting tutorial subnetting made easy frame relay tutorial wireless tutorial virtual local area network vlan tutorial vlan trunking protocol vtp tutorial ipv6 tutorial rapid spanning tree protocol rstp tutorial spanning tree protocol stp tutorial network address translation nat tutorial access list tutorial rip tutorial eigrp tutorial ospf tutorial practice ccna gns3 labs ccna lab challenges ccna 200 301 ccna faqs tips basic questions topology architecture questions cloud virtualization questions cdp lldp questions switch questions vlan trunking questions vlan trunking questions 2 stp vtp questions etherchannel questions tcp udp questions ip address subnetting questions ip routing questions ip routing questions 2 ospf questions ospf questions 2 eigrp questions nat questions ntp questions syslog questions hsrp questions access list questions aaa questions security questions security questions 2 dai questions ipv6 questions dns questions qos questions port security questions wireless questions wireless questions 2 sdn questions dna center questions drag drop questions drag drop questions 2 drag drop questions 3 vpn questions dhcp questions automation questions miscellaneous questions share your ccna experience network resources free router simulators ccna website encor website ensdwi website enarsi website devnet website ccie r s website security website wireless website design website data center website service provider website collaboration website top copyright 2014 2023 ccna training privacy policy disclaimer contact us
|