CS6250 COMPUTER NETWORK EXAM 2
ACTUAL 200 PLUS EXPERT CERTIFIED
QUESTIONS AND ANSWERS ALREADY
GRADED A+
⩥ Why would equipment diversity cause complexity when
managing a network?
Answer: Different software must be used for different protocols
(7)
⩥ Why do proprietary technologies cause complexity when
managing networks?
Answer: Some equipment (router, switch, etc.) run on
closed/proprietary software
Configuration interfaces vary as a result.
This causes issues for managing devices centrally. (7)
⩥ What is the simple idea of SDN that helps make networks
more manageable?
,Answer: Separate tasks into control plane and data plane. (7)
⩥ What are the 3 phases of history of SDN?
Answer: 1. Active networks
2. control plane and data plane separation
3. OpenFlow API and network operating systems (7)
⩥ What led to the growth of active networks, and what is their
goal?
Answer: 1. the tediousness of standardizing new protocols
2. goal is to open up network control with an API that exposes
resources and supports *customization of functionalities* for
subsets of packets passing through network nodes
(7)
⩥ Why do active networks conflict with idea of E2E?
,Answer: They require customization at network nodes (not
simplicity at network core)
(7)
⩥ What were the two types of programming models in active
networking? How are thy different?
Answer: 1. Capsule model
- carries in band data packets
- most used in relation to active networking
- code distribution ACROSS networks
- data plane
2. Programmable router/switch model
- out of band mechanisms
- decision-making a job for the NETWORK OPERATOR
- Difference is where the code to execute at the nodes was
carried (7)
⩥ What are 4 tech developments that encouraged active
networking?
, Answer: 1. reduction in computation cost (more processing can
take place in the network)
2. advancement in programming languages
3. advancement in rapid code compilation and formal methods
4. funding agencies promoted interoperability among projects
- necessary because there were no short-term use cases
(7)
⩥ What are 4 problems that encouraged active networking?
Answer: 1. developing network services took a long time
2. third party interests to dynamically meeting needs of app and
network conditions
3. researches needed a network for large-scale experiments
ACTUAL 200 PLUS EXPERT CERTIFIED
QUESTIONS AND ANSWERS ALREADY
GRADED A+
⩥ Why would equipment diversity cause complexity when
managing a network?
Answer: Different software must be used for different protocols
(7)
⩥ Why do proprietary technologies cause complexity when
managing networks?
Answer: Some equipment (router, switch, etc.) run on
closed/proprietary software
Configuration interfaces vary as a result.
This causes issues for managing devices centrally. (7)
⩥ What is the simple idea of SDN that helps make networks
more manageable?
,Answer: Separate tasks into control plane and data plane. (7)
⩥ What are the 3 phases of history of SDN?
Answer: 1. Active networks
2. control plane and data plane separation
3. OpenFlow API and network operating systems (7)
⩥ What led to the growth of active networks, and what is their
goal?
Answer: 1. the tediousness of standardizing new protocols
2. goal is to open up network control with an API that exposes
resources and supports *customization of functionalities* for
subsets of packets passing through network nodes
(7)
⩥ Why do active networks conflict with idea of E2E?
,Answer: They require customization at network nodes (not
simplicity at network core)
(7)
⩥ What were the two types of programming models in active
networking? How are thy different?
Answer: 1. Capsule model
- carries in band data packets
- most used in relation to active networking
- code distribution ACROSS networks
- data plane
2. Programmable router/switch model
- out of band mechanisms
- decision-making a job for the NETWORK OPERATOR
- Difference is where the code to execute at the nodes was
carried (7)
⩥ What are 4 tech developments that encouraged active
networking?
, Answer: 1. reduction in computation cost (more processing can
take place in the network)
2. advancement in programming languages
3. advancement in rapid code compilation and formal methods
4. funding agencies promoted interoperability among projects
- necessary because there were no short-term use cases
(7)
⩥ What are 4 problems that encouraged active networking?
Answer: 1. developing network services took a long time
2. third party interests to dynamically meeting needs of app and
network conditions
3. researches needed a network for large-scale experiments
