Suggested Certification for Wireless Network Engineer

Enterprise Wireless Certifications - CWNP
Recommended Book 1 for Wireless Network Engineer

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Recommended Book 2 for Wireless Network Engineer

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Recommended Book 3 for Wireless Network Engineer

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Recommended Book 4 for Wireless Network Engineer

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Recommended Book 5 for Wireless Network Engineer

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Interview Questions and Answers

Best practices include creating detailed network diagrams, documenting IP address schemes, access point configurations, security settings, and troubleshooting procedures.

In small businesses, the role may be more general and involve a wider range of IT responsibilities. In large enterprises, the role is typically more specialized and focused on wireless network infrastructure.

Challenges include managing interference, ensuring capacity, and providing reliable connectivity to a large number of devices simultaneously. Solutions involve advanced antenna technologies and network planning.

They use network management systems (NMS) to monitor network health, track performance metrics, and receive alerts for potential issues.

Ethical considerations include protecting user data, implementing strong security measures, and complying with data privacy regulations.

The salary ranges from $70,000 to $140,000 per year, depending on experience, location, and industry.

They use network simulation tools to model and analyze network performance, test different configurations, and predict the impact of changes before implementation.

Emerging trends include Wi-Fi 6/6E, 5G, millimeter wave technology, private 5G networks, and the Internet of Things (IoT).

They use network analyzers, spectrum analyzers, and packet capture tools to identify and resolve issues related to connectivity, interference, and performance.

They design and configure mesh networks to provide extended coverage, redundancy, and self-healing capabilities in challenging environments.

They design and implement wireless networks to support IoT devices, ensuring connectivity, security, and scalability for large-scale IoT deployments.

An Independent Basic Service Set(IBSS) or ad hoc network is the simplest of all IEEE 802.11 networks in that no network infrastructure is required.

When one Access Point (AP) is connected to wired network and a set of wireless stations it is referred to as a Basic Service Set (BSS).

Extended Service Set (ESS), as name suggests, is a group of BSSs or one or more interconnected BSS along with their wired network.

WLAN is the standard to provide moderate to high speed data communications in a short range; WiMAX is the standard to provide Internet access over a long range outdoor environment.

Direct sequence spread spectrum (DSSS) and Complementary Code Keying (CCK) are modulation schemes employed in WLAN devices compliant to IEEE 802.11b. DSSS is used to provide support for 1 Mbps and 2 Mbps data rate. CCK for 5.5 and 11 Mbps while OFDM is used for higher data rate applications. OFDM is used in IEEE 802.11a, 11g, 11n, 11ac and 11ad versions.

OSI refers to Open Systems Interconnection and TCP/IP refers to Transmission Control Protocol. OSI follows a vertical approach and TCP/IP follows a horizontal approach. Just like the upper layers, the OSI model uses two separate layers Physical and Datalink, to define the functionalities of the bottom layers while the TCP/IP uses a single layer (Link layer) for the same.

The Control And Provisioning of Wireless Access Points (CAPWAP) protocol is a standard, interoperable networking protocol that enables a central wireless LAN Access Controller (AC) to manage a collection of Wireless Termination Points (WTPs), more commonly known as wireless access points.

The protocol uses a generic encapsulation and transport mechanism, making it independent of a specific radio technology. The specification of CAPWAP for a particular wireless technology is called a binding. An IEEE 802.11 binding is provided in RFC 5416.

When the AP joins a WLC, a Control and Provisioning of Wireless Access Points protocol (CAPWAP) tunnel is formed between the two devices. All traffic, which includes all client traffic, is sent through the CAPWAP tunnel.

802.11n is faster than 802.11g, which itself is faster than the earlier 802.11b.

802.11a operates at 2.4GHz RF frequency and supports data rate up to 54Mbps. WLAN frame structure consists mainly PLCP Preamble, Signal (Header) part and Data Part. PLCP preamble field, composed of 10 repetitions of a \"short training sequence \" and two repetitions of a \"long training sequence\" preceded by a guard interval (GI). Header part consists of 24 bits which is BPSK modulated. Header part contains Rate (modulationcode rate) and length (Unit of OFDM symbols) of the Data part.

In WLAN, one symbol consists of 64 point FFT. It consists of 48 data carriers, 4 pilot carriers, 1 DC and rest of the carriers are used as guard carriers. The 11a standard defines modulationcode rate table, based on data rate various physical layer configuration is made.

All the client (802.11) packets are encapsulated in a LWAPP packet by the LAP and sent to the WLC. WLC descapsulates the LWAPP packet and acts based on the destination IP address in the 802.11 packet.

Association request.

WLAN11ac has been introduced after previous version of WLAN which include 802.11a, 11b, 11g and 11n. 80MHz channel bandwidth is added.

WLAN devices serve a range of distances and data rates depending on the IEEE standard they support.

Bluetooth and WiFi are both wireless technologies. Bluetooth is solely used to connect your devices to each other, while WiFi is used to connect your devices to the internet.

In infrastructure mode, a wireless network's devices connect with one another via an access point (wireless router). A computer with a wireless network adapter communicates directly with a printer that has a wireless print server in ad hoc mode.