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TCP |
Which protocol’s header would a Layer 4 device read and process? |
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Port Number |
What number does a host use to identify the application involved in a transmission? |
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Checksum |
What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? |
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Network Layer (Layer 3) |
At which layer does IP operate? |
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Network Layer (Layer 3) |
Which OSI layer is responsible for directing data from one LAN to another? |
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Static Route |
What kind of route is created when a Net Admin configs a router to use a specific path between nodes? |
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Gateway of Last Resort |
When a router can’t determine a path to a message’s destination, where does it send the message? |
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AD (Administrative Distance) |
A routing protocol’s reliability and priority are rated by what measurement? |
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BGP (Border Gateway Protocol) |
Which routing protocol does an exterior router use to collect data to build its routing table? |
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Ping |
When messages to a remote web server are being lost for no reason and you suspect the problem might be a pth MTU black hole, which TCP/IP utility can you use to diagnose the problem? |
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TCP is connection-based, Sequencing and Checksums, and Flow Control |
What three characteristics distinguish TCP from UDP? |
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TCP uses a process called the Three-Step Handshake |
What process is used to establish a TCP connection? |
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IGMP ( Internet Group Management Protocol ) and ARP (Address Resolution Protocol) |
Which two protocols are essential to IPv4 networks, but whose functions are performed by ICMPv6 on IPv4 networks? |
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Statics ARP tables are those that someone has entered manually using the ARP utility via arp command. Dynamic ARP tables are created when a client makes an arp request that could not be satisfied by data already in the arp table. |
What is the difference between dynamic ARP table entries and static ARP table entries? |
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Connect dissimilar networks. Interpret L3 and L4 addressing, determine best path for data to flow, and reroute traffic if primary path is down |
What four functions do all router perform? |
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Routing Table |
What database does a router consult before determining the most efficient path for delivering a message? |
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Routing loop |
Manually modifying a routing table can cause messages to get stuck hopping between a limited number of routers. What is this problem called? |
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Hop Count, Routing Cost, and latency. |
Give three examples of routing metrics used by routers to determine the best of various available routing paths. |
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A looking glass site |
What kind of web site allows you to remotely collect network routing information back to your actual location? |
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RIP (Routing Information Protocol), RIPv2 (Routing Information Protocol Version 2), and OSPF (Open Shortest Path First) |
List three interior gateway protocols (IGPs) |
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