A network administrator installs a network device that focuses on interconnecting independent local networks. at which layer of devices does this technology reside?

• The ring topology looks like a circle of connected devices, where each device is connected to two neighbors (one on either side). • The mesh topology looks like a circle with lines inside it, showing that every device is connected to every other device. • The star topology has a device at the center and then a connection between that center device and the other five devices. • The bus topology shows a center line with connections coming off the line for each device. No device is directly connected to another device, but they are all connected via the central line. • The tree topology starts with a single device at the top which branches to connect with two more devices. The left child device branches to connect with two more devices, while the right child only has one branch connecting it to a child device. There are three layers to the tree. The largest type of network is a Wide Area Network (WAN), a network that extends over a large geographic area and is composed of many, many LANs. Oftentimes, the networks in a WAN can only be connected by leasing telecommunications lines from different companies, since no single company owns all the infrastructure across the wide geographic area. However, there are networks that use other protocols that are more suited for their task. Data center networks often opt to use networking protocols that take advantage of the incredibly closely knit architecture of the data center. That enables data centers to more efficiently run intensiv...

The Open Systems Interconnection (OSI) Reference Model is a The OSI model was originally developed to facilitate interoperability between vendors and to define clear standards for network communication. However, the older The 7 layers of the OSI model This image illustrates the seven layers of the OSI model. Below, we’ll briefly describe each layer, from bottom to top. 1. Physical The lowest layer of the OSI model is concerned with data communication in the form of electrical, optic, or electromagnetic signals physically transmitting information between networking devices and infrastructure. The • Electrical, mechanical, and physical systems and networking devices that include specifications such as cable size, signal frequency, voltages, etc. • • • Data transmission performance, such as • Modulation, switching, and interfacing with the physical transmission medium • Common protocols including Wi-Fi, Ethernet, • Hardware including networking devices, antennas, cables, modem, and intermediate devices such as repeaters and hubs 2. Data Link The second layer of the OSI model concerns data transmission between the nodes within a network and manages the connections between physically connected devices such as switches. The raw data received from the physical layer is synchronized and packaged into data • The Logical Link Control (LLC) sublayer is responsible for • The Media Access Control (MAC) sublayer is responsible for managing access and permissions to transmit data between...

Bias-Free Language The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. The International Organization for Standardization (ISO) network management model defines five functional areas of network management. This document covers all functional areas. The overall purpose of this document is to provide practical recommendations on each functional area to increase the overall effectiveness of current management tools and practices. It also provides design guidelines for future implementation of network management tools and technologies. The ISO network management model's five functional areas are listed below. • Fault Management—Detect, isolate, notify, and correct faults encountered in the network. • Configuration Management—Configuration aspects of network devices such as configuration file management, inventory management, and software management. • Performance Management—Monitor and measure various aspects of performance so that overall performance can be maintained at an acceptable ...

Table of Contents • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Cisco Catalyst 9800 Series wireless controllers combine RF excellence with Cisco IOS-XE benefits. These highly reliable and highly secure controllers are ready to deploy anywhere—including the cloud. An organization can also choose the Cisco Embedded Wireless Controller on Cisco Catalyst 9100 Series APs, for Cisco Catalyst controller features without a dedicated appliance. • Cisco Catalyst 9800 Series wireless controllers are built on the three pillars of network excellence—always on, secure, and intelligent—which strengthen the network by providing the best wireless experience without compromise, while saving time and money. • • • • • • Cisco Catalyst 9100 Series APs can handle the challenges of the next-generation network. Going beyond the Wi-Fi 6 (802.11ax) standard, Cisco Catalyst 9100 Series APs are resilient and intelligent and provide integrated security for mobile clients and IoT devices. Key benefits of the Cisco Catalyst 9100 Series APs include the following: • • Cisco DNA Spaces provides organizations with rich location-based wireless services, including location analytics, business, insights, customer engagement toolkits, asset management, enterprise integrations, and location data APIs. This cloud-based platform, which is compatible across Cisco Aironet, Cisco Catalyst and Cisco Meraki wireless APs, lets your enterprise see activity at its ...

Switches allow devices on your network to communicate with each other, as well as with other networks, creating a network of shared resources. Through information sharing and resource allocation, switches save money and increase productivity. There are two basic types of switches to choose from as part of your networking basics: • A managed on-premises switch lets you configure and monitor your LAN, giving you tighter control of your network traffic. • Have a small IT team? A cloud-managed switch can simplify your network management. You get a simple user interface, multisite full-stack management, and automatic updates delivered directly to the switch. Routers connect multiple networks together. They also connect computers on those networks to the Internet. Routers enable all networked computers to share a single Internet connection, which saves money. A Routers connect your business to the world, protect information from security threats, and can even decide which computers receive priority over others. Beyond those basic networking functions, routers come with additional features to make networking easier or more secure. Depending on your An access point acts like an amplifier for your network. While a router provides the bandwidth, an access point extends that bandwidth so that the network can support many devices, and those devices can access the network from farther away. But an access point does more than simply extend Wi-Fi. It can also give useful data about the d...

Create your own flash cards! Cards Term QUESTION NO: 1 After adding a new cable segment to the network, the technician should: A. Update the disaster recovery plan. B. Document the changes in the business continuity plan. C. Update the wiring schematics. D. Create a new baseline document. Definition Answer: C Term QUESTION NO: 2 Which of the following devices can be used to breakup a broadcast domain? A. Unmanaged switch B. Router C. DHCP server D. Bridge Definition Answer: B Term QUESTION NO: 3 Which of the following is a secure way to transfer files from one device to another? A. SFTP B. SNMPv3 C. TFTP D. FTP Definition Answer: A Term QUESTION NO: 4 An administrator has a networking closet on the first floor of a building with all of the network and communication equipment. However, the telephony provider installed the communications line in the basement. Which of the following needs to be extended to connect the line to the networking closet? A. Smart jack B. Demarcation point C. Patch panel D. Router Definition Answer: C Term QUESTION NO: 5 Which of the following methods is used to provide access to a VPN? A. IGP B. PPTP C. PPP D. RAS Definition Answer: B Term QUESTION NO: 6 Two clients are directly connected via RJ-45 and CAT5e cables and communicating with IP. The first client sends data out of its RJ-45 on pins 1 and 2. On which of the following pins will the client expect to receive a response? A. 1 and 2 B. 2 and 3 C. 3 and 6 D. 5 and 6 Definition Answer: C Term Q...

Connecting devices is not simply running cables from a device to another, you have to know what you are doing. All the devices in a network and the way they are connected together form the network topology, the topic of this article. We will learn what are the possible network topologies out there, what is their difference and how changing from a topology to another can completely modify the way our network works. With that knowledge, you will be ready to climb the OSI stack easily. Network topology at a glance Network topologies can be defined as the map of a network, but the formal definition is the following. A network topology is the representation of links between the nodes within a network. This can feel somehow too formal, at a first glance, and probably it is, but once we clarified the concept of node and link you will truly understand this definition. A node is any device that can be plugged into a network: it does not matter how it can be plugged in (with a cable, in Wi-Fi and so on), but as long as it is capable of communicating with the rest of the network it is considered a node. A Desktop computer is a node, but also a router, a smartphone, a laptop, or a switch. Even smart-home devices such as connected-fridges or lamps are considered nodes if they can talk over a network. A node could be virtually everything: a PC, a router, a smartphone, a laptop, a switch, a fridge, or a lamp. The node is any device. The link, instead, is any type of connection that can a...