Chapter 4 Review Questions
A routing protocol's reliability and priority are rated by what measurement?
(AD) administrative distance
Which protocol is supported by ICMPv6 to facilitate neighbor discovery on an IPv6 network?
- Discovering neighbor devices, a process used by routers to learn about all the devices on their networks: - IPv6 devices use Neighbor Discovery Protocol (NDP), to automatically detect neighboring devices and automatically adjust when neighboring nodes fail or are removed
What is the Internet standard MTU?
1,500 bytes
What four functions do all routers perform?
1. Connect dissimilar network 2. interpret Layer 3 and often Layer 4 addressing. 3. Determine the best path for data to follow from point A to Point B. 4. Reroute traffic if the path of the first choice is down.
Which routing protocol does an exterior router use to collect data to build its routing tables?
BGP (Border gateway protocol)
What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source?
Checksum
What is the difference between dynamic ARP table entries and static ARP table entries?
Dynamic ARP is used when a ARP request can not be satisfied by data already in the ARP table, and Static ARP is when someone manually entered using the ARP utility.
When a router can't determine a path to a message's destination, where does it send the message?
Gateway of Last Resort
Give three examples of routers to determine the best of various available routing paths?
Hop count MTU (maximum transmission unit) Routing cost
Which two protocols manage neighbor discovery processes on IPv4 networks?
ICMP and ARP
At which OSI layer does IP operate?
Layer 3 the network layer
Which OSI layer is responsible for directing data from one LAN to another?
Network Layer
Which two fields in an Ethernet frame help synchronize device communications but are not counted toward the frame's size?
Preamble and SFD
List three interior gateway protocols (IGPs).
RIP, RIPv2 OSPF IS-IS
What database does a router consult before determining the most efficient path for delivering a message?
Routing table
What kind of route is created when a network administrator configures a router to use a specific path between nodes?
Static routing
Which protocol's header would a Layer 4 device read and process.
TCP
What process is used to establish a TCP connection?
TCP Three-Way Handshake
What three characteristics distinguish TCP from UDP.
TCP is Connection-oriented, provides reliability through checksum, flow control, and sequencing information.
Which Linux utility provides output similar to Wireshark's?
tcpdump
