DevNet Associate DEVASC 200-901 Official Certification Guide by Adrian Iliesiu (z-lib.org)

Several network reference models have been developed through the years, some of them proprietary and some open. Two reference mo ...

network equipment vendors that focus on developing devices that operate at Layer 2 of the OSI model, called switches, and device ...

Figure 16-1 OSI Model Layers Applications that need to transmit data over the network start at the application layer, gathering ...

for him or her and then goes ahead and reverses part of the process you went through, removing the paper from the envelope and r ...

The Logical Link Control (LLC) layer is responsible for encapsulating network layer data and frame synchronization. The network ...

reassembles it into a stream of data on the receiving device. This layer specifies several mechanisms so that data is reliably t ...

This type of data transmission is mostly used for real- time traffic such as voice and video, in which it is better to ignore th ...

data at the application layer is displayed correctly on both systems. Also at this layer, the data is differentiated and encoded ...

Cold War, and the main purpose of the project was to build a telecommunications network that would be able to withstand a nuclea ...

controlled, and which device can transmit at which point. Switching and switches, as described later in this chapter, operate at ...

interconnected routers. Through this functionality, the Internet layer makes possible internetworking and the connection of diff ...

TCP uses several different technologies to ensure reliable bit stream delivery. First of all, data is delivered in the order in ...

In order to be able to communicate between devices using a layered model, the protocols running at each layer on the source host ...

protocol running at the transport layer takes the data it received from the application layer, adds its header information, and ...

endpoint within a local-area network (LAN). This section introduces several networking concepts: Ethernet, MAC addresses, VLANs, ...

Figure 16-5 Ethernet Frame Format Preamble: This field consists of 8 bytes of alternating 1s and 0s that are used to synchronize ...

When the least significant bit of a MAC address’s first byte is 0, it means the frame is meant to reach only one receiving NIC, ...

Virtual Local-Area Networks (VLANs) A virtual local-area network (VLAN) is a group of devices on an Ethernet network that are lo ...

a best practice to keep the Layer 2 broadcast domain as small as possible. Going back to the university campus example, imagine ...

devices connect to the network either through an Ethernet port available on the NIC or through a wireless NIC that connects to a ...