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67 Cards in this Set
- Front
- Back
What are the 4 layers of TCP/IP?
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Application, Transport, Internet, and Network Access
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What two protocols reside at the Transport layer of the TCP/IP stack?
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TCP and UDP
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What does the Address Resolution Protocol (ARP) do?
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translates IP addresses into MAC addresses
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What entity is responsible for assigning common port numbers?
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the Internet Assigned Numbers Authority (IANA)
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What port does FTP data use?
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20
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What is port 20 commonly used for?
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FTP data
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What port does FTP control use?
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21
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What commonly uses port 21?
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FTP control
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What port does Telnet use?
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23
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What commonly uses port 23?
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Telnet
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What port does SMTP use?
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25
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What commonly uses port 25?
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SMTP
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What port does DNS use?
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53
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What commonly uses port 53?
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DNS
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What port does Kerberos use?
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88
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What commonly uses port 88?
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Kerberos
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What port does POP3 use?
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110
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What commonly uses port 110?
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POP3
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How many Class A networks are there?
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126
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How many hosts will a Class A network support?
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~16 million
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What is the host ID for a Class A network?
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1-126
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How many Class B networks are there?
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~16 thousand
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How many hosts will a Class B network support?
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~65,000
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What is the host ID for a Class B network?
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127-191
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How many Class C networks are there?
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~2 million
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How many hosts will a Class C network support?
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254
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What is the Host ID for a Class C network?
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192-223
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What is the Class A private use block?
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10.0.0.0/8
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What is the Class B private use block?
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172.16.0.0-172.31.255.255
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What is the Class C private use block?
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168.168.0.0/16
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What is the formula for determining the number of subnets provided by a given subnet mask? |
# of subnets = 2^n, where n = number of bits in the mask |
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What is the formula for determining the number of hosts on each subnet provided by a given subnet mask?
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2^n-2, where n = number of bits in the host portion of the address
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What is the formula for determining the subnet numbers for a given subnet mask?
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256-mask's "interesting octet"; each subnet number will be a multiple of the difference
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How many bits are in an IPv6 address?
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128 bits
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What is stateless autoconfiguration?
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IPv6's ability to configure Internet-usable addresses automatically
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How long is an IPv6 header?
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40 bytes
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What component of ISATAP does the IPv6 to IPv4 translation?
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the hosts
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What component of 6to4 does address type translation?
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6to4 routers
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What advantage does Teredo have over ISATAP and 6to4?
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it works well with NATs
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How does Teredo get around issues with NATs?
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it packages IPv6 packets inside UDP packets
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What are the three types of packets used by IPv6?
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unicast, multicast and anycast
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What DNS record type is used for IPv6 addresses?
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AAAA
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How are anycast addresses used?
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multiple devices receive the same IPv6 address, and the first to receive packets directed to that address claim them
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What is the IPv6 loopback address?
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::1
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What is a link-local address?
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an address usable only on the local network segment (not routable)
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What is the prefix for an IPv6 link-local address?
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FE80::/10
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What is the prefix for an IPv6 multicast address?
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FF00::/8
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What protocol replaces ARP in IPv6?
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Neighbor Discovery
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What two pieces make up Neighbor Discovery?
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Neighbor Solicitation (NS) and Neighbor Advertisement (NA)
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What is the prefix for the IPv6 global unicast space?
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2000::/3
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What is a local unicast address?
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a private IP address, not routable on the Internet
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What are the prefixes for the local unicast address space?
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FC00::/7 or FD00::/8
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What is the prefix for the IPv6 multicast address space?
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FF00::/8
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What is the prefix for Teredo addresses?
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2001::/32
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What is the prefix for 6to4 addresses?
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2002::/16
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In ISATAP, are the participating hosts aware of translation?
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yes (translation performed by hosts)
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In 6to4, are the participating hosts aware of translation?
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no (translation performed by routers)
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What are the 4 parameters of a UDP header? |
source port, destination port, length, and checksum |
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What sorts of applications are likely to use UDP rather than TCP? |
applications where speed is more important than reliability (voice and video in particular) |
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What TCP/IP layer does IP operate at? |
the Network layer |
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What TCP/IP layer does ICMP operate at? |
the Network layer |
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What is a Network-layer PDU called? |
a packet |
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What is a Data Link-layer PDU called? |
a frame |
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What does IP generate if it hits an error? |
an ICMP message |
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What TCP/IP layer does PPP operate at? |
the Network Access layer |
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What TCP/IP layer does Ethernet operate at? |
the Network Access layer |
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What TCP/IP layer does Frame Relay operate at? |
the Network Access layer |