Questions

Question 1

What is used to track and manage alloted IP addresses, ensuring address availability for server and VM farms?

Answer 1

IPAM tools

Question 2

What is the primary focus of the Internet Group Management Protocol (IGMP) in a network?

Answer 2

To manage IP multicast group memberships

Question 3

What is channel bonding?

Answer 3

Channel bonding combines multiple internet connections for increased speed and reliability. Also known as link aggregation or broadband bonding, combines multiple network connections into a single unified pipeline to enhance internet speed. Combines multiple internet connections to create a supercharged network

Question 4

Explain the meaning of CDN?

Answer 4

Content delivery network - is a geographically distributed group of servers that caches content close to end users. Allows for the quick transfer of assets needed for loading internet, including HTML pages, JavaScript files, stylesheets, images and videos.

Question 5

What is anycast and what does it do?

Question 6

What is stateful failover?

Question 7

What is load balancing?

Answer 7

The Network Load Balancing (NLB) feature distributes traffic across several servers by using the TCP/IP networking protocol. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers.

Question 8

What is high availability clustering?

Question 9

What is virtual router redundancy protocol?(VRRP)

Question 10

What are sub interfaces and what are they used for?

Question 11

What is QOS (Quality of Service)?

Question 12

What is Equal-Cost Multipath (ECMP)?

Question 13

What is Link Aggregation?

Question 14

What is extensible authentication protocol?

Question 15

What is IEEE?

Answer 15

Institute of Electrical and Electronics Engineers

Question 16

What are the IEEE standards for WIFI?

Answer 16

IEEE802.11 - 2.4ghz WI-FI standard created in 1997 - The basis for WI-FI wireless networks
IEEE802.11b - Introduced in 1999, operates at 2.4ghz - To reduced interference from microwaves, cordless phones etc and to acheive higher data rates it incorporated modulation schemes called direct sequence spread spectrum/complementary code keying(DSSS/CCK). Enabled wireless communications at distances of 38m indoors and 140m outdoors.
IEEE802.11a - Also introduced in 1999, was successor to IEEE802.11b. First WIFI specification to feature a multi-carrier modulation scheme (OFDM) to support high data rates, unlike b’s single-carrier design. Supported 5GHZ operation and its 20MHz bandwidth supported multiple data rates.
IEEE802.11g - Introduced in 2003. Allowed for faster data rates of up to 54mbit/s in the same 2.4GHz frequency band as 11b, due to OFDM multi carrier modulation scheme and other enhancements. Appealing to mass market users as 2.4GHz devices cheaper than 5GHz devices.
IEEE802.11n introduce in 2009 to support 2.4 GHz & 5GHz frequency bands with up to 600Mbit/s data rates, multiple channels within each frequency band, and other features. This standard enabled the use of WLAN networks in placed of wired networks, significant feature enabling new use cases and reduced operational costs for end users and IT organizations.
IEEE802.11ac introduced in 2013 to support data rates up to 3.5Gbit/s with greater bandwidth, additional channels, better modulation and other features. First WIFI standard to enable the use of multiple input/multiple output (MIMO) technology so that multiple antennas could be used on both sending and receiving devices to reduce errors and boost speed.