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34 Cards in this Set
- Front
- Back
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What OSI layer provides services to allow end devices to exchange data across the network?
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Network layer 3
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An end device with a configured IP address is referred to as a what?
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Host
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What are some old legacy network layer protocols that are not widely used anymore?
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IPX
Apple Talk CLNS/DECNet |
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What are the basic characteristics of the IP protocol?
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Connectionless
Best effort (unreliable) Media independent |
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Does IP protocol have high overhead or low overhead on a network?
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Low overhead
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What upper layer of the OSI model and protocol handles the reliability of communication?
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TCP at the Transport layer 4
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What is the one characteristic of media that the network layer must consider?
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Maximum transmission unit (MTU)
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What intermediate device usually will handle fragmenting a packet?
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A router
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What are the 2 parts to an IPv4 packet?
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IP header
Payload |
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What are some of the significant fields in the IPv4 header?
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Version
Differentiated services (DS) TTL Protocol Source IP Destination IP |
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What IPv4 header field is used to determine the priority of each packet?
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DS
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What command is used to identify the routers used between the source and destination?
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Traceroute
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What IPv4 header field identifies the number of 32 bit words in the header?
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Internet header length
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What IPv4 header field has a maximum value of 65535 bytes?
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Total length
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What IPv4 header field error checks the IP header - if incorrect, the packet is discarded?
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Header checksum
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What are 3 major issues that are attributed to IPv4?
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Address depletion
Internet routing table expansion Lack of end-to-end connectivity |
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What IPv4 issue is due to NAT?
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Lack of end-to-end connectivity
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What are the advantages of IPv6 over IPv4?
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Increased address space
Improved packed handling Eliminates the need for NAT Integrated security |
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How many bits is IPv6 addressing based on compared with IPv4?
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128 vs 32
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Header simplification, efficient packet handling by routers, and increased scalability/longevity are examples of what IPv6 advantage?
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Improved packet handling
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Single households being able to use a public IPv6 network address is an example of what advantage of IPv6?
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Eliminating the need for NAT
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What IPv6 header field is always set to 0110?
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Version
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What IPv6 header field classifies packets for congestion control?
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Traffic class
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What IPv6 header field identifies the application type to the upper layer protocol?
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Next header
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What IPv6 header field, when the value reaches 0, notifies the sender that the packet was not delivered?
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Hop limit
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What IPv6 header field can be set to use the same pathway flow so that packets are not reordered upon delivery?
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Flow label
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What IPv6 header field identifies the packet fragment size?
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Payload length
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What is the IPv4 loopback address?
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127...
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The router connected to the local network segment is referred to as what?
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Default gateway
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What data file, used in RAM, by a router to store information about directly connected network addresses as well as entries of remote networks to determine the best path?
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Routing table
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What command on a windows computer can be used to display the host routing table?
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route print
or netstat -r |
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Routing tables in routers store information on what 2 kinds of routes?
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Directly connected routes
Remote routes |
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What command is used on a cisco router to display the routing table of a router?
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show ip route
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Networks directly connected to a router do not have a ___________ address because a router can forward packets directly to hosts on the network.
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next-hop
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