|
Which protocol’s header would a Layer 4 device read and process? |
TCP |
|
What number does a host use to identify the application involved in a transmission? |
Port Number |
|
What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? |
Source Port Checksum |
|
At which OSI layer does IP operate? |
Network Layer |
|
Which OSI layer is responsible for directing data from one LAN to another? |
Network Layer |
|
What kind of route is created when a network administrator configures a router to use a specific path between nodes? |
Static Route |
|
When a router can’t determine a path to a message’s destination, where does it send the message? |
Gateway of Last Resort |
|
A routing protocol’s reliability and priority are rated by what measurement? |
AD |
|
Which routing protocol does an exterior router use to collect data to build its routing tables? |
BGP |
|
When messages to a remote Web server are being lost for no apparent reason and you suspect the problem might be a path MTU black hole, which TCP/IP utility can you use to diagnose the problem? |
Ping |
|
What three characteristics distinguish tcp from udp? |
TCP is connection oriented protocol and UDP is connectionless. TCP messages arrive in order while the order of messages from UDP is uncertain. TCP data is like a stream and data packets may arrive in multiple packets, UDP is sent individually and packets are guaranteed to arrive whole. |
|
What process is used to establish a TCP connection? |
Three-way process called handshake |
|
Which two protocols are essential to ipv4 networks, but whose functions are performed by icmpv6 on ipv6 networks? |
Igmp (Internet Group Management Protocol) and Arp (Address Resolution Protocol) |
|
What is the difference between dynamic arp table entries and static arp table entries? |
Static: Those that someone has entered manually using the arp utility via arp command, Dynamic: created when a client makes an arp request that could not be satisfied by data already in the arp table |
|
What four functions do all routers perform? |
1. Connecting Dissimilar networks (ex. lan and wan) 2. Interpreting layer 3 and often layer 4 addressing 3. Determining the best path for data to follow from point A to point B 4. Rerouting the traffic if the first choice path is down but another is available. |
|
What database does a router consult before determining the most efficient path for delivering a message? |
Routing table which maintain information about where the host are located |
|
Manually modifying a routing table can cause messages to get stuck hopping between a limited number of routers. What is this problem called? |
Routing Loop |
|
Give three examples of routing metrics used by routers to determine the best of various available routing paths. |
Hop Count, Latency, and Routing Cost |
|
What kind of web site allows you to remotely collect network routing information back to your actual location? |
Looking glass site |
|
List three interior gateway protocols. (igps). |
RIP, RIPv2, and OSPF |
Share This
Flashcard
