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35 Cards in this Set

  • Front
  • Back
[501] Which layer defines routing and addressing?
[501] Layer 3
[502] Which layer is responsible for end-to-end delivery of packets?
[502] Layer 3
[503] What does ARP stand for, and what is it?
[503] Address Resolution Protocol. It is used to dynamically learn the data-link address of an IP host connected to a LAN
[504] What is the name for logical groups of addresses in TCP/IP?
[504] Subnet or network
[505] What is the name for logical groups of addresses in AppleTalk?
[505] Cable range
[506] What is the name for logical groups of addresses in IPX?
[506] Network
[507] How many bits is an IP address? What is the name and size of the Grouping Field? What is the name and size of the Local Address Field?
[507] 32 bits. The Subnet or network portion is variable, between 8 and 30 bits. The Host portion is variable, between 2 and 24 bits.
[508] How many bits is an IPX address? What is the name and size of the Grouping Field? What is the name and size of the Local Address Field?
[508] 80 bits. The Network portion is 32 bits. The Node portion is 48 bits.
[509] How many bits is an AppleTalk address? What is the name and size of the Grouping Field? What is the name and size of the Local Address Field?
[509] 24 bits. The Network portion is 16 bits. The Node portion is 8 bits.
[510] What is the difference between a routing protocol and a routed protocol?
[510] A routing protocol learns routes and put those routes in a routing table. A routed protocol is the type of packet forwarded through a network. RIP is a routing protocol, IP is a routed protocol.
[511] If two computers are separated by a router, what must be true of their addresses?
[511] Their addresses must be in different groups
[512] How many bits make up the network portion of a Class A IP address?
[512] 8 bits, leaving 24 for the host portion
[513] How many bits make up the network portion of a Class B IP address?
[513] 16 bits, leaving 16 for the host portion
[514] How many bits make up the network portion of a Class C IP address?
[514] 24 bits, leaving 8 for the host portion
[515] How many addresses are available in a Class A networK? Class B? Class C?
[515] Class A = (2^24)-2 Class B = (2^16)-2 Class C = (2^8)-2
[516] List the interesting powers of 2, up to 32
[516] 2^2=4, 2^3=8, 2^4=16, 2^5=32, 2^6=64, 2^7=128, 2^8=256, 2^9=512, 2^10=1024, 2^11=2048, 2^12=4096, 2^16=65,536, 2^32=4,294,967,296
[517] Which addresses are reserved in each Class A, B, or C network?
[517] The network number and the broadcast address - the lowest numerical value inside the network, and the largest
[518] Which body is responsible for assigning IP addresses?
[518] The Network Information Center (NIC)
[519] What are the valid network numbers for Class A networks? How many total networks are available?
[519] 1.0.0.0 to 126.0.0.0 - (2^7)-2
[520] What are the valid network numbers for Class B networks? How many total networks are available?
[520] 128.1.0.0 to 191.254.0.0 - (2^14)-2
[521] What are the valid network numbers for Class C networks? How many total networks are available?
[521] 192.0.1.0 to 223.255.254.0 - (2^21)-2
[522] What does URL stand for?
[522] Universal Resource Locator
[523] What does DNS stand for?
[523] Domain Name System
[524] What does DHCP stand for?
[524] Dynamic Host Configuration Protocol
[525] What does PING stand for?
]525] Packet INternet Groper
[526] What does ICMP stand for?
[526] Internet Control Message Protocol
[527] What are the three main protocols for assigning IP addresses dynamically?
[527] RARP, BOOTP, and DHCP
[528] What does BOOTP stand for?
[528] Boot Protocol
[529] What does RARP stand for?
[529] Reverse ARP
[530] What information can a computer using RARP request?
[530] IP address - that's it
[531] What information can a computer using BOOTP request?
[531] IP address, subnet mask, default gateway, other server IP addresses, and the name of a file that the computer should download
[532] What is the main advantage of DHCP over RARP and BOOTP?
[532] Both RARP and BOOTP require a server which knows the MAC address of every computer connected, as well as configuration parameters for each computer that requests an IP.
[533] What are the goals of routing protocols?
[533] 1. To dynamically learn and fill the routing table with a route to all subnets in the network. 2. If more than one route to a subnet is available, to place the best route in the routing table. 3. To notice when routes in the routing table are no longer valid, and to remove those routes from the routing table. 4. If a route is removed from the routing table and another route through another neighboring router is available, to add the route to the routing table. 5. To add new routes, or replace existing routes with the best currently available route as quickly as possible. 6. To prevent routing loops.
[534] What is convergence time?
[534] The time between losing a route and find a working replacement
[535] When do routes for directly connected subnets get added to the routing table?
[535] When the interface is first initialized