Unit 4

When a router can't determine a path to a message's destination, where does it send the message? Gateway of last resort Default gateway Administrative distance Routing table

Gateway of Last Resort

Which two protocols manage neighbor discovery processes on IPv4 networks? BGP and OSPF IPv4 and IPv6 ICMP and ARP TCP and UDP

ICMP and ARP

At which OSI layer does IP operate? Transport layer Application layer Data Link layer Network layer

Network Layer

Which OSI layer is responsible for directing data from one LAN to another? Physical layer Network layer Transport layer Data Link layer

Network Layer

You have set up an FTP server on your Ubuntu Server system and suspect a hacker is trying to gain access to your FTP site. Which command allows you to monitor all network traffic to the server?

Nmap, dig, TCPdump

Linux is:

An open source implementation of the Unix kernel

Which routing protocol does an exterior router use to collect data to build its routing tables? OSPF IP RIPv2 BGP

BGP

What is the Internet standard MTU? 65,535 bytes 1,522 bytes 1,500 bytes 9,198 bytes

1,500 bytes

Within what range is an APIPA address?

169.254.0.1 - 169.254.255.254

A routing protocol's reliability and priority are rated by what measurement? AD Routing table MTU Latency

AD

Your computer has auto configured another IP address after you've accidentally duplicated it. What type of address did it configure?

APIPA

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 DiffServ Acknowledgment number Source port

Chesksum

After manually changing your IP address your computer identified the duplicate IP address problem. How can you tell?

It displays the duplicate address warning within CMD after typing the command 'ipconfig /all'

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

Static Route

Which protocol's header would a Layer 4 device read and process? HTTP ARP TCP IP

TCP

The tcpdump command allows you to see

The TCP packets going in and out of the network interface

Using Firefox Web Browser in Ubuntu, you discover that a URL with a domain name does not work, but when you enter the IP address of the website you are seeking, the home page appears. Which command might help you resolve the problem?

dig

You are troubleshooting a problem where your Ubuntu system cannot locate a printer on the network. Which command might help?

route