Cisco Networking 3
Terms
undefined, object
copy deck
- What are the 4 steps in establishing a connection-oriented session?
- synchronize; negotiate connection; synchronize; and acknowledge
- What are the 3 phases in a connection-oriented session?
- call setup (connection establishment); data transfer; and call termination
- What are the 4 advantages of LAN segmentation?
- security; broadcast control; performance; and scalability
- Why is Layer 2 switching considered hardware-based bridging?
- it uses application-specific integrated circuits (ASIC's)
- What are the 2 advantages of application-specific integrated circuits (ASIC's)?
- high speed and low latency
- What OSI layer are filter tables part of?
- layer 2 (Data Link)
- How are filter tables created?
- by reading the source hardware address of each frame that passes through
- What does transparent bridging refer to?
- layer 2 devices only pass frames to segments that contain destination addresses
- What does a layer 2 device do with a frame with an unfamiliar hardware address?
- forwards it to all connected segments
- Why is it possible for all segments on a switch to transmit at once, but not on a hub?
- each segment on a switch is its own collision domain
- How must all Class A IP addresses start?
- with a binary 0
- How must all Class B IP addresses start?
- with a binary 10
- How must all Class C IP addresses start?
- with a binary 110
- What is the formula for the number of valid subnets created by a given subnet mask?
- 2ⁿ - 2, where n = number of masked bits
- What is the formula for the number of valid hosts per subnet created by a given subnet mask?
- 2ⁿ - 2, where n = number of unmasked bits
- What is the formula for the address octet of the first valid subnet created by a given subnet mask?
- 256 - last octet of subnet mask
- What are the four layers of the DoD model?
- Process/Application, Host-to-Host, Internet, and Network Access
- What OSI layer(s) does the Process/Application layer map to?
- Application, Presentation, and Session
- What OSI layer(s) does the Host-to-Host layer map to?
- the Transport layer
- What OSI layer(s) does the Internet layer map to?
- the Network layer
- What OSI layer(s) does the Network Access layer map to?
- the Data Link and Physical layers
- What DoD layer does bootP work at?
- the Internet layer
- What DoD layer does ICMP work at?
- the Internet layer
- What does Cisco use ICMP for?
- sending updates to routers about route or packet problems
- What does a router do if it can't forward a datagram?
- it sends a "destination unreachable" message to the sender via ICMP
- What does a router do if its memory buffer is full?
- sends a "buffer full" message to senders via ICMP
- What happens if a datagram reaches its hop limit?
- the last router to receive it deletes it and sends an obituary message via ICMP
- What protocol does ping use?
- ICMP