CCNA ICND1

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Author:
joelgarnick
ID:
302954
Filename:
CCNA ICND1
Updated:
2015-05-19 20:15:30
Tags:
CCNA Cisco Networking
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CCNA ICND1 Questions
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  1. Describe OSI Layer 1
    • Physical
    • Moves bits between devices
    • Specifies voltage, wire speed, and pinout of cables
    • Physical Topology
  2. Describe OSI Layer 2
    • Data Link
    • Combines packets into bytes and bytes into frames
    • Provides access to media using MAC address
    • Performs error detection, not correction
    • Framing
  3. Describe OSI Layer 3
    • Network
    • Provides logical addressing, which routers use for path determination
    • Routing, Packets
  4. Describe OSI Layer 4
    • Transport
    • Provides reliable or unreliable delivery
    • Performs error correction before retransmit
    • End-to-end Connection
  5. Describe OSI Layer 5
    • Session
    • Keeps different applications' data seperate
    • Dialog Control
  6. Describe OSI Layer 6
    • Presentation
    • Presents data
    • Handles processing such as encryption
    • Data Encryption, Compression, and Translation Services
  7. Describe OSI Layer 7
    • Application
    • Provides a user interface
    • File, Print, Message, Database, and Application Services
  8. Describe Class A Address
    • Have value in the first octet between 1 and 127
    • Default subnet mask of 255.0.0.0
  9. Describe Class B Address
    • Have value in the first octet between 128 and 191
    • Default subnet mask of 255.255.0.0
  10. Describe Class C Address
    • Have value in the first octet between 192 and 223
    • Default subnet mask of 255.255.255.0
  11. Describe Class A Private Address
    In the range of 10.0.0.0
  12. Describe Class B Private Address
    In the range of 172.16.0.0 to 172.31.255.255
  13. Describe Class C Private Address
    In the range of 192.168.0.0 to 192.168.255.255
  14. Three examples of invalid addresses to assign to a host
    • 1. Begins with 127 (reserved for loopback)
    • 2. All host bits set to 0
    • 3. All host bits set to 1
  15. Ethernet Frame Format
    • Preamble: 7 bytes
    • SFD: 1 byte
    • Destination: 6 bytes
    • Source: 6 bytes
    • Type: 2 bytes
    • Data and Pad: 46-1500 bytes
    • FCS: 4 bytes
  16. What are the layers of the OSI Model?
    • Application
    • Presentation
    • Session
    • Transport
    • Network
    • Data Link
    • Physical
  17. Match the first four OSI layers to the correct terminology:
    1. Network -- A. frame
    2. Data Link -- B. segment
    3. Transport -- C. bits
    4. Physical -- D. packet
    • 1. Network -- D. packet
    • 2. Data Link -- A. frame
    • 3. Transport -- B. segment
    • 4. Physical -- C. bits
  18. What are the layers of the DoD Model?
    • Process/Application
    • Host-to-Host
    • Internet
    • Network Access
  19. What layers of the OSI model do the 4 layers of the DoD model roughly correlate to?
    1. Process/Application___________
    2. Host-to-Host________________
    3. Internet____________________
    4. Network Access______________
    • 1. Process/Application: Application, Session, & Presentation
    • 2. Host-to-Host: ¬†Transport
    • 3. Internet: ¬†Network
    • 4. Network Access: Data Link and Physical
  20. There are 12 fields in a TCP segment header, name them.
    • Source Port
    • Destination Port
    • Sequence Number
    • Acknowledgement Number
    • Header Length
    • Reserved
    • Code bits/flags
    • Window
    • Checksum
    • Urgent
    • Options
    • Data
  21. There are 5 fields in a UDP segment header, name them.
    • Source Port
    • Destination Port
    • Length
    • Checksum
    • Data
  22. There are 14 fields in an IP header, name them.
    • Version
    • Header length
    • Priority and Type of Service
    • Total Length
    • Identification
    • Flags
    • Fragment Offset
    • Time To Live
    • Protocol
    • Header Checksum
    • Source IP Address
    • Destination IP Address
    • Options
    • Data
  23. What is Class D Address Space?
    Multicast
  24. What is Class E Address Space?
    Reserved for research
  25. ROM memory on a Cisco device is used to store:
    • POST
    • Bootstrap
    • ROMMON

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