Commands
Port Numbers
Cables and Tools
Models
Protocols
100
What is the command used to test the reachability of a network appliance or node?
Ping
100
What is the port number for SNMP? BONUS: What does SNMP stand for? DOUBLE BONUS: What does it allow for?
161 Simple Network Management Protocol Managing network devices and sending/receiving administrative alerts
100
A copper cable that has T568A on one end and T568B on the other is called what? When is it utilized and why? BONUS: Which wires do this?
Cross-over cable, used when connecting two similar network devices to ensure speed of sending and receiving of information 1 + 2 and 3 + 6
100
Routers work at what layer of the OSI model (name and number)?
Network, Layer 3
100
What two protocols are used primarily with VoIP?
SIP and RTP (session initiation protocol and real-time transport protocol)
200
If I'm trying to find the IP address for www.google.com, what TWO commands can be used?
nslookup and dig
200
What protocol and port number keep time for all network devices?
NTP - Network Time Protocol, 123
200
Put in order from farthest to shortest travel capabilities: 10GBaseLR 10GBaseSR 10GBaseER BONUS: What type of fibre does each cable utilize?
10GBaseER (Extended Range) 10GBaseLR (Long Range) 10GBaseSR (Short Range) ER, LR = Single-mode SR = Multi-mode
200
What is a PDU (both acronym and purpose)? BONUS: What is it called at OSI Level 4?
Protocol Data Unit, it is a discrete chunk of information for transmission, along with appropriate headers and control information TCP = Segment, UDP = Datagram
200
Security concerns: SSH has taken the place of what? TLS has taken the place of what?
Telnet/regular FTP (either or accepted), SSL
300
If you want to see the path a packet takes to reach its destination, what command would you use?
Tracert
300
What ports do DHCP work on? BONUS: What protocol does it use? DOUBLE BONUS: What is the system of operation used in DHCP?
67/68 UDP DORA (Discovery, Offer, Request, Acknowledgment)
300
You're testing a 1000BaseT cable with your OTDR and not getting any proper readings. What is your next step with your piece of equipment?
Sit down and take a break, because you can't use an OTDR to test copper. (Remember, the O stands for Optical)
300
What are the seven layers of the OSI model? BONUS: What layers do they match up with in the TCP/IP model and what are the names?
Level 1 - Physical Level 2 - Data Link Level 3 - Network Level 4 - Transport Level 5 - Session Level 6 - Presentation Level 7 - Application OSI 1 and 2 match with TCP/IP 1 - Link OSI 3 matches up with TCP/IP 2 - Internet OSI 4 matches up with TCP/IP 3 - Transport OSI 5-7 match up with TCP/IP 4 - Application
300
What resolves IP addresses to MAC addresses? BONUS: What layer of the TCP/IP model does it work at?
ARP (Address Resolution Protocol) Internet, Level 2
400
What command provides you with listing of session information, active ports, and general connection information on your specific node, among others?
Netstat
400
What is the port number for DNS? BONUS: What are the three main components of DNS operation?
53 DNS Server, DNS Records, Dynamic DNS
400
Which of the following are fiber connectors? F BNC MTRJ RJ-11 STC LLC
Just MTRJ. F = coaxial BNC = coaxial MTRJ = fiber RJ-11 = copper STC = non-existent, ST and SC are fiber however LLC = coupled with MAC (media access control), logical link control is a sublayer of Level 2 in the OSI model (Data Link), LC is a fiber connector
400
What level of the OSI model does a NIC operate on? BONUS: How many bits is a MAC address? DOUBLE BONUS: Extended MAC?
Level 1 48 64
400
What is the main difference between TCP/IP and UDP?
TCP/IP is connection-oriented; it will guarantee a connection before transmission. UDP is connection-less; it passes information blindly to the correct destination, hoping it arrives.
500
Both ping and tracert use which protocol to operate?
ICMP (Internet Control Message Protocol)
500
What are the primary port numbers for HTTP and HTTPS? BONUS: What are the secondary port numbers for HTTP and HTTPS?
80, 443 8080, 8443
500
What is the point where the ISP passes responsibility off to the client end of service?
Demarc
500
What layer of the OSI model system does the TCP/IP handshake occur at? BONUS: What are the components?
Session, Layer 5 Synchronization, Synchronization-Acknowledgment, Acknowledgment (SYN/SYN-ACK/ACK)
500
What security protocol is based on time-sensitive tickets and a central, trusted server passing mutual authentication information to both nodes (usually client and server)?
Kerberos
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