Network+ 01

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Author:
esmenikmati
ID:
177804
Filename:
Network+ 01
Updated:
2012-10-22 10:58:22
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network beginning
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Description:
N+ 01
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  1. TCP/IP Model: Defines protocols that handle file transfer/mail
    Application Layer (4)
  2. TCP/IP Model: Defines protocols for end-end transfer of data, flow/error controls
    Transport Layer (3)
  3. TCP/IP Model: Defines protocols for encoding/transmitting data over a network
    Network Interface Layer (1)
  4. Intention of OSI Model
    Standardize Networking
  5. Intention of TCP/IP Model
    Support Internet-related tasks
  6. Information at Application/Presentation/Session layers
    Data
  7. Information at Transport layer
    Segment
  8. Information at Network layer
    Packet
  9. Information at Data Link layer
    Frame
  10. Information at Physical layer
    Bit
  11. ISDN BRI
    • 56kbps/channel 
    • twisted pair
  12. ISDN PRI
    • 1.5 Mbps
    • twisted pair
  13. POTS
    • 56kbps
    • Twisted pair
  14. PSTN
    • 64kbps/channel
    • twisted pair
  15. Frame Relay
    56k - 64 Mb over varying media
  16. T1
    • 1.5 Mbps
    • Fiber, TP, Coax
  17. IFCONFIG
    Linux/Unix command line tool that is similar to IPCONFIG in Windows.
  18. ARP PING (ARPING)
    tests whether a given IP address is in use on the local network, and can get additional information about the device using that address.
  19. Hostname
    The hostname command is used to show or set a computer's host name and domain name.
  20. Dig (domain information groper)
    Dig is a Linux/Unix tool for interrogating DNS name servers. It performs DNS lookups and displays the answers that are returned from the name server(s) that were queried. 
  21. NBTSTAT
    Is a Windows utility used to troubleshoot connectivity problems between 2 computers communicating via NetBT, by displaying protocol statistics and current connections.
  22. PPP
    • encapsulation over single-channel WAN
    • intended for dial-up
  23. PPoE 
    PPP over Ethernet
  24. VNC (Virtual Network Computing)
    RDP, but supports multiple platforms (Andoird phones, linux, etc)
  25. ICA
    Protocol for application servers
  26. Kerberos
    Network authentication using KDC server (keys)
  27. AAA
    • Authentication
    • Authorization
    • Accounting
    • RADIUS and TACACS+
  28. TACACS+ vs RADIUS
    TACACS+ uses TCP, separates authentication and authorization
  29. CHAP
    3-Challenge Handshake used with PPP protocol
  30. EAP
    • Extensible Authentication
    • Extension of PPP
  31. SSH
    • Secure Shell, Application-layer protocol
    • Part of IP suite
  32. HTTP
    • application layer
    • uses SSL/TLS
  33. SNMP
    • Network Mgmt Protocol
    • Used to monitor network devices
    • Application Layer
  34. SFTP
    • Secure FTP
    • Uses port 22, SSH
  35. SCP
    • Secure Copy
    • uses SSH(22) to copy files
  36. Telnet
    Port 23
  37. HTTP
    80
  38. RSH
    Unencrypted version of SSH
  39. Man in the Middle
    Data theft
  40. Smurf
    Reverse DoS
  41. FTP
    20, 21
  42. SSH
    22
  43. SMTP
    25
  44. DNS
    53
  45. DHCP
    67
  46. TFTP port
    69
  47. POP3
    110
  48. NTP Port
    123
  49. IMAP4 Port
    143
  50. SNMP port
    161
  51. HTTPS
    443
  52. IP A range
    1 - 126
  53. IP B Range
    127 - 191
  54. IP C Range
    192 - 223
  55. loopback IP
    • 127.x.x.x
    • 127.0.0.1
  56. SNAT
    • Secure NAT
    • 1:1 Translation
  57. APIPA default IP range
    • 169.254.x.x
    • Class B 
  58. CIDR
    • Classless
    • x.x.x.x/x notation
  59. EIGRP
    Combines distance-vector and link-state routing protocols
  60. Link-State Protocols
    • OSPF
    • IS-IS
  61. VLSM
    Variable Length Subnet Masking
  62. IGP
    • Interior Protocols
    • IS-IS
    • OSPF
    • RIP
    • EIGRP
  63. EGP
    • Exterior Protocols
    • BGP
  64. 802.11a
    • 54Mbps
    • 100ft
    • 5GHz
  65. 802.11b
    • 11Mbps
    • 300ft
    • 2.4 GHz
  66. 802.11g
    • 54 Mbps
    • 300 ft
    • 2.4 GHz
  67. 802.11n
    • 540 Mbps
    • 600 ft
    • 2.4 / 5 GHz
  68. WPA2
    uses 256-bit AES encrypted password
  69. TKIP
    • Temporal Key
    • meant to replace WEP, but was also flawed/vulnerable
  70. CAT3
    UTP, 10Mbps
  71. CAT4
    • UTP 16-20 Mbps
    • Token Rings
  72. CAT 5
    UTP 100Mbps
  73. CAT5e
    CAT5, but goes farther (100-350m)
  74. CAT6
    • 1Gbps, up to 220m
    • backwards compatible
  75. Multimode Fibers
    • Thicker, faster
    • high attenuation, meant for short distances
  76. BNC
    • Bayonet
    • Used on RG58(10Base2)
  77. RG58
    • Thinnet
    • 10Mbps, 600 ft
    • 50 ohms
  78. RG8
    • Thicknet
    • 10Mbps, 1600 ft
    • 50 ohms
  79. RJ-11
    • 4-6 wires
    • CAT1 cable
  80. ST Connector
    • Fiber bayonet, half-twist
    • half-duplex
  81. SC
    Fiber, lego push-pull
  82. LC
    • Mini-SC connector
    • half-duplex
  83. Ring Topology
    • used on SONET, FDDI networks
    • Any station can send a packet, but only if they have the token
    • token is passed around ring
    • fast, simple, but not fault tolerant
  84. Straight thru vs Crossover
    • Crossover connects similar devices
    • uses 568A on one end and 568B on other
  85. Rollover cable
    connects CISCO routers to computers
  86. Frame Relay
    • uses virtual circuits to allocate bandwidth
    • packet switches from 56k to T1
  87. T1/T3
    • Copper/Fiber
    • 1.54Mbps on 24 channels of dedicated line
  88. ATM
    • Async Transfer Mode
    • High speed, voice/video/data through cells
  89. SONET/SDH
    • Synchronous data transmission over fiber
    • 10Gbps - 40 Gbps
  90. Circuit Switching
    Telephone lines
  91. 100 Base TX
    100 meters, CAT5 Twisted pair
  92. 100 Base FX
    2k meters, ST/SC fiber
  93. 1000 Base T
    100 m, CAT5e or higher
  94. OSI Acronym
    All People Seem To Need Data Processing
  95. Layer 7 Application examples
    FTP, DNS, Telnet, SMTP
  96. Layer 6 Presentation examples
    SSL, TLS
  97. Layer 5 Session Examples
    TCP, RTP
  98. Layer 4 Transport Examples
    TCP, UDP
  99. Layer 3 Internet Examples
    IP, IPSec, IGMP, ISPF
  100. SIP
    • Session Initiation Protocol
    • VoIP
  101. IGMP
    Group Membership
  102. RTP
    • Real-Time Transport
    • Used to deliver a/v content
  103. SNMP
    Network Mgmt
  104. RARP
    MAC -> IP
  105. mtr
    • linux
    • traceroute + ping
  106. route
    routing table
  107. stateful firewall
    compares individual packet to connection context

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