Chapter 4: Network Protocols and Routing

What database does a router consult before determining the most efficient path for delivering a message?

a routing table

Which Linux utility provides output similar to Wireshark's?

tcpdump

What process is used to establish a TCP connection?

three-way handshake

Give three examples of routing metrics used by routers to determine the best of various available routing paths.

(ANY THREE)Hop Count, Theoretical bandwidth and actual throughput, Delay or latency, Load (network traffic), MTU, Routing cost, Reliability of potential path, a network's topology

What three characteristics about TCP distinguish it from UDP?

* Connection-oriented * Sequencing and checksums * Flow control

What is the Internet standard MTU?

1,500 bytes

What four functions do all routers perform?(1)

1.)Connect dissimilar networks, such as a LAN and a WAN, which use different types of routing protocols.

What four functions do all routers perform?(2)

2.)Interpret Layer 3 and often Layer 4 addressing and other information (such as quality of service indicators).

What four functions do all routers perform?(3)

3.)Determine the best path for data to follow from point A to point B.

What four functions do all routers perform?(4)

4.)Reroute traffic if the path of first choice is down but another path is available.

A routing protocol's reliability and priority are rated by what measurement?

AD (Administrative Distance)

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 entries are created when a client makes an ARP request for information that isn't on the current ARP table. Static ARP tables are entered manually 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

Which two protocols manage neighbor discovery processes on IPv4 networks?

ICMP and ARP

Which protocol is supported by ICMPv6 to facilitate neighbor discovery on an IPv6 network?

NDP (Neighbor Discovery Protocol)

At which OSI layer does IP operate?

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 (start frame delimiter)

List three IGPs (interior gateway protocols).

RIP, RIPv2, EIGRP, OSPF, and IS-IS (List any Three)

What kind of route is created when a network administrator configures a router to use a specific path between nodes?

Static route

Which protocol's header would a Layer 4 device read and process?

TCP