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33 Cards in this Set
- Front
- Back
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OSI Layers
7 6 5 4 3 2 1 |
7 - Application
6 - Presentation 5 - Session 4 - Transport 3 - Network 2 - Data Link 1 - Physical |
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OSI Layer Summary
7 6 5 4 3 2 1 |
7 - Application - File, print, message, database, and application services
6 - Presentation - Data encryption, compression, and translation services 5 - Session - Dialog control 4 - Transport - End-to-end connection 3 - Network - Routing 2 - Data Link - Framing 1 - Physical - Physical topology |
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Binary Value Decimal Value
10000000 11000000 11100000 11110000 11111000 11111100 11111110 11111111 |
Binary Value Decimal Value
10000000 - 128 11000000 - 192 11100000 - 224 11110000 - 240 11111000 - 248 11111100 - 252 11111110 - 254 11111111 - 255 |
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Hex - Binary - Decimal
A B C D E F |
Hex - Binary - Decimal
A - 1010 - 10 B - 1011 - 11 C - 1100 - 12 D - 1101 - 13 E - 1110 - 14 F - 1111 - 15 |
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Encapsulation
L4 L3 L2 L1 |
L4 - Segments
L3 - Packets L2 - Frames L1 - Bits |
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OSI - DoD
L5, L6, L7 L4 L3 L1, L2 |
OSI - DoD
L5, L6, L7 - Process/Application L4 - Host-to-Host L3 - Internet L1, L2 - Network Access |
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DHCP provides 6 main items:
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IP address
Subnet mask Domain name Default gateway (routers) DNS server address WINS server address |
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TCP 6 key features are:
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Sequenced
Reliable Connection-oriented Virtual circuit Acknowledgments Windowing flow control |
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UDP 6 key features are:
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Unsequenced
Unreliable Connectionless Low overhead No acknowledgment No windowing or flow control of any type |
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TCP port numbers
Telnet SMTP HTTP FTP DNS HTTPS SSH POP3 NTP IMAP4 |
Telnet - 23
SMTP - 25 HTTP - 80 FTP - 20, 21 DNS - 53 HTTPS - 443 SSH - 22 POP3 - 110 NTP - 123 IMAP4 - 143 |
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What are the UDP port numbers?
SNMP TFTP DNS BooTPS/DHCP |
SNMP - 161
TFTP - 69 DNS - 53 BooTPS/DHCP - 67 |
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What is the protocol number found in IP header?
ICMP (echo) IP in IP (tunneling) TCP IGRP UDP EIGRP OSPF IPv6 GRE L2TP (layer 2 tunnel) |
ICMP (echo) - 1
IP in IP (tunneling) - 4 TCP - 6 IGRP - 9 UDP - 17 EIGRP - 88 OSPF - 89 IPv6 - 41 GRE - 47 L2TP (layer 2 tunnel) - 115 |
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What is the protocol found in IP header?
1 4 6 9 17 88 89 41 47 115 |
ICMP (echo) - 1
IP in IP (tunneling) - 4 TCP - 6 IGRP - 9 UDP - 17 EIGRP - 88 OSPF - 89 IPv6 - 41 GRE - 47 L2TP (layer 2 tunnel) - 115 |
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What is a bit?
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One digit (0 or 1)
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What is a byte?
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7 or 8 bits (parity)
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What is an octet?
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8-bit binary number.
Byte = octet |
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Class A layout
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Network - Host - Host - Host
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Class B layout
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Network - Network - Host - Host
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Class C layout
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Network - Network - Network - Host
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Class D
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Multicast
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Class E
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Research
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What is the Class A network address range and design?
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0 - 127
0xxxxxxx |
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What is the Class B network address range and design?
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128 - 191
10xxxxxx |
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What is the Class C network address range and design?
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192 - 223
110xxxxx |
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What is the Class D network address range?
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224 - 239
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What is the Class E network address range?
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240 - 255
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What is the Class A reserved address space?
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10.0.0.0 through 10.255.255.255
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What is the Class B reserved address space?
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172.16.0.0 through 172.31.255.255
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What is the Class C reserved address space?
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192.168.0.0 through 192.168.255.255
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What is the Class A default subnet mask?
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255.0.0.0
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What is the Class B default subnet mask?
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255.255.0.0
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What is the Class C default subnet mask?
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255.255.255.0
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What are the powers of 2 (through 14)?
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2^1 = 2 2^8 = 256
2^2 = 4 2^9 = 512 2^3 = 8 2^10 = 1,024 2^4 = 16 2^11 = 2,048 2^5 = 32 2^12 = 4,096 2^6 = 64 2^13 = 8,192 2^7 = 128 2^14 = 16,384 |
