§ General Knowledge Questions
o Describe the OSI model.
o What is the difference between a repeater, bridge, router?
§ relate this to the OSI model
o Describe an Ethernet switch and where it fits into the OSI model.
§ What is a VLAN?
o Relate WDM/ATM/SONET to the OSI model.
o Explain how to configure a host network interface (e.g. IP address, netmask, broadcast address)?
o Describe Ethernet packet contents: min./max. size, header.
o Describe TCP/IP and its protocols.
o Describe ATM and what are its current advantages and disadvantages.
§ Describe SONET
o What are the maximum distances for CAT5 cabling?
o Which contacts of an RJ-45 connector are used for 10BaseT? 100BaseT? 1000BaseT?
o Describe UDP and TCP and the differences between the two.
o What is your current IP address?
o Describe what a broadcast storm is.
o Describe what a runt, a giant, and a late collision are and what causes each of them.
o How do you distinguish a DNS problem from a network problem?
o Describe the Bandwidth Delay problem.
o What is CDP?
§ Network Troubleshooting
o Explain how traceroute, ping, and tcpdump work and what they are used for?
§ Describe a case where you have used these tools to troubleshoot.
o What is the last major networking problem you troubleshot and solved on your own in the last year?
o What LAN analyzer tools are you familiar with and describe how you use them to troubleshoot and on what media and network types.
§ Routing
o Explain the contents of a routing table (default route, next hop, etc.)
o What routing protocols have you configured?
§ describe the commands to set up a route
§ what routing problems have you troubleshot
o How do you display a routing table on a Cisco? on a host?
§ How do you use a routing table and for what?
o What is a route flap?
o What is a metric?
o When do you use BGP, IGRP, OSPF, Static Routes?
§ Network Security
o What do you see as current networking security issues (e.g. NFS mounting, spoofing, one time passwords, etc.)?
o Describe a routing filter and what it does.
o Describe an access list and what it does.
o What are some examples of protocols used for VPN connections?
§ Network Management
o What is a network management system?
o Describe how SNMP works.
o What is a MIB?
§ Previous Work
o Describe the working environment you are currently in, e.g. frequent
interruptions, frequent priority shifting, team or individual.
o What do you use to write documentation? Editor? Mail reader?
o What platform (s) do you currently work on at your desk?
o How do you manage multiple concurrent high-level projects?
o Describe a recent short-term stressful situation and how you managed it.
o How do you manage a long term demanding stressful work environment?
o Have you worked in an assignment-based environment, e.g. work request/
trouble-ticket system, and if so, describe that environment.
§ Programming
o What applications have you written in C, JAVA, PERL, or other languages.
§ Network Statistics and Measurement
o Describe what network statistics or measurement tools you are familiar with and how you have used them.
§ Wireless
o Describe how 802.11b works and the advantages and disadvantages of using it.
o Describe how WEP works and its strengths and weaknesses
o Describe what a VPN is and how it works.
§ VoIP
o Describe how VoIP works.
o Describe methods of QoS.
o Describe the difference between the Integrated Services and the Differentiated Services QoS models.
o How does the ToS bit work?
o What is a voice codec?
o What is a dial plan and what does it do?
o What is a Mean Opinion Score (MoS)?
o Describe the basic boot up sequence for an IP phone."
§ Optical
o Describe what WDM is and how it works.
o What's the difference between DWDM and CWDM? Why would each be used?
o What is an EDFA? What does it do? How does it work?
o How many dB's of attenuation results in 50% of a signal is getting thru? 10%?
o What's a typical attenuation for SM fiber at 1310 nM? 1550nM?
§ RAS
o What is a RAS and how does it work?
o Describe the current modem standard and how it works.
o Describe what a PRI is and how it works.
§ Project Management
o Describe a long term, large scale project you managed.
o What is your experience with scheduling and project management?
§ What computer packages have you used?
§ What tools have you used?
o How many staff have you directly managed?
§ Training/Presentations
o How would you train other engineers/technicians on network troubleshooting?
o What is the last formal training you have had including seminars,
tutorials, classes, etc.?
o What conferences have you attended in the last two years?
o What periodicals do you read on a regular basis?
o What professional organizations do you belong to and participate in?
Friday, January 07, 2011
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