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QUALITY OF SERVICE (QOS) EXAM 2025 QUESTIONS AND ANSWERS Why is Quality of Service important? - ....ANSWER ...-When looking to provision Real Time communications across a network that is being shared w/ data. How does Quality of Service help? - ....ANSWER ...-All elements in the network ( & WAN provider network) are configured to recognize Real Time communications streams & give them the treatment or 'priority' they need in order to get to their destination on time. W/in the LAN & WAN Voice quality is dependent on? - ....ANSWER ...-Delay, Jitter, Packet loss & Bandwidth. For best Voice quality Delay should be? - ....ANSWER ...-One way end-to-end should be no more than 150ms. AKA latency. For best Voice quality Jitter should be? - ....ANSWER How to test for Delay & Jitter? - ....ANSWER ...-No more the 30ms. ...-Ping tests ( -l or -s linx/unix parameter loads the ping packets to a more realistic size). In a fully switched Ethernet environment will Delay be a problem? ....ANSWER ...-Delay will not be problem, but routers will insert move delay into a network. ...©️ 2025, ALL RIGHTS RESERVED 1