Cisco Networking 1
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- What device is used to separate subnets?
- a router
- What are the three default subnet masks?
- 255.0.0.0 (Class A), 255.255.0.0 (Class B), 255.255.255.0 (Class C)
- What is the first octet range for Class A networks?
- 1-127
- What is the first octet range for Class B networks?
- 129-191
- What is the first octet range for class C networks?
- 192-223
- What is the maximum number of Class A networks available?
- 127
- What is the maximum number of Class B networks available?
- 16,383
- What is the maximum number of Class C networks available?
- 2,097,151
- What three address ranges are reserved for private networks?
- 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16
- What standard defines Ethernet?
- IEEE 802.3
- Who originally develeoped Ehthernet?
- Digital, Intel, and Xerox (DIX)
- What does Ethernet do when it detects a collision
- waits a random period of time and resends
- When not using auto-detect, how should a NIC be configured when connected to a hub?
- half-duplex
- What media access control method does Ethernet use?
- Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
- What is the maximum packet size for Ethernet?
- 1518 bytes
- What standard defines Fast Ethernet?
- 802.3u
- What is the maximum speed of Fast Ethernet?
- 100 Mbps
- What cable type is required for 10BaseT?
- Cat3
- What are the three types of Fast Ethernet?
- 100BaseTX, 100BaseFX, and 100BaseT4
- What cable type does 100BaseTX require?
- Cat5
- What cable type does 100BaseFX require?
- fiber optic
- What cable type does 100BaseT4 require?
- Cat3 (uses 2 extra wires)
- What standard defines Gigabit Ethernet?
- IEEE 802.3z
- What is the 5-4-3 rule?
- Ethernet can support a maximum of 5 segments connected by 4 repeaters with nodes on 3 segments
- What is a bridge?
- a Layer 2 device that connects different or same-type networks
- Does a bridge allow broadcasts?
- yes
- Does a bridge forward traffic?
- not if the destination segment is the same as the originating segment
- How much latency does a bridge introduce?
- 20-30%
- What do gateways do?
- enable communications between different protocols, data types, and environments
- What are non-root ports on non-root bridges considered?
- nondesignated- they neither send nor receive traffic
- What mode are nondesignated ports in?
- blocking mode- they neither send nor receive traffic