Question 9) Core layer design considerations include.. A) Performance B) Availability C) Redundancy D) All of above Question 10) QoS is important in A) Borderless architecture B) Collaborative architecture C) Data centre architecture D) All of above Question 11) Multiple collision domains are found in A) Hubs B) Switches C) Both of a) and b) D) None of above Question 12) Organisational email is an example of application A) Peer-to-peer B) Client-local server C) Client-data centre D) All of above Question 13) Connection-oriented services are part of layer. A) Data link layer B) Network layer C) Transport layer D) Application layer