CIS 150 Midterm
What is the maximum supported throughput of a CAT6 cable?
10 Gbps
When planning horizontal cabling, what is the maximum allowable distance that can be used?
100 meters
Which of the following IP addresses would be a loopback IP address?
127.0.0.1
In the classful addressing scheme, what range of network addresses is considered a Class B?
128.0.x.y to 191.255.x.y
When using the Routing Information Protocol (RIP), what is the maximum number of hops a message can take between its source and its destination before the destination is considered unreachable?
15
By default, what is the MTU size on a typical Ethernet network?
1500 bytes
Equipment data racks most commonly are a standard width of what measurement?
19 inches
Which of the following is not a task handled by a router?
A router forwards broadcasts over the network.
In a DNS zone, what type of record holds the name-to-address mapping for IPv6 addresses?
AAAA record
Which of the following connectors uses a polished curved surface but has end faces that are placed at an angle to each other?
APC
What statement regarding the differences between the Windows tracert utility and the Linux/UNIX/macOS traceroute utility is accurate?
By default, the tracert utility uses ICMP echo requests, while traceroute uses UDP datagrams or TCP SYN messages.
What is the minimum category of UTP cable required in order to support Gigabit speeds?
Cat 5e
At which layer of the OSI model is a packet encapsulated with its own header and trailer to create a frame?
Data link layer
A 66 block is more suitable for data connections than the older 110 block. T or F
False
A serial cable with an RJ-45 connector is capable of being used through an RJ-45 Ethernet port. T or F
False
A short circuit is one where needed connections are missing, such as when a wire breaks. T or F
False
An IPv6 address consists of 128 bits that are written as 10 blocks of hexadecimal numbers separated by colons. T of F
False
Cable that is coated with flame-resistant polyvinyl chloride (PVC) is acceptable for use in plenum areas. T or F
False
DNS follows a centralized database model, allowing for easier management of DNS records. T or F
False
F5 Networks set the standard for the diagram symbols used to represent routers, switches, firewalls, and other devices. T or F
False
ICANN is responsible for restrictions on use of the .com, .org, and .net TLDs. T or F
False
IPv4 and IPv6 use the same packet format. T or F
False
Routing Information Protocol (RIP) is an interior gateway protocol that uses a link-state algorithm. T or F
False
Static electricity is an electrical charge in motion. T of F
False
TCP uses a four-step process called a four-way handshake to establish a TCP connection. T or F
False
The 1024 - 65535 range of ports is also known as the "well-known" range. T or F
False
The Data Link layer attaches a trailer to the end of a packet, and does not include a header. T or F
False
The FTP protocol utilizes UDP, while TFTP uses TCP for data transmission. T or F
False
The ST and SC fiber connectors are the most commonly found connectors due to their smaller sizes. T or F
False
The Transmission Control Protocol (TCP) is considered to be a connectionless, or best-effort delivery protocol. T or F
False
The Transport layer header addresses a receiving application by a number called a MAC address. T or F
False
The Transport layer header addresses a receiving application by a number called a MAC address. T or F
False
The most common type of networking cable is a crossover cable. T or F
False
The pathping utility sends 10 pings per hop by default. T or F
False
The protocol data unit for the Physical layer of the OSI model is payload, or data. T or F
False
UDP provides error checking, but not sequencing. T or F
False
Which of the following tools transmits light-based signals of different wavelengths in order to accurately measure the length of a the fiber?
OTDR (optical time domain reflectometer)
When using DHCP for IPv6 (i.e. DHCPv6), what port do clients receive responses on?
Port 547
What type of tool would you utilize to terminate twisted pair wire on a 66 or 110 block?
Punchdown tool
What Application layer protocol can be used to monitor and gather information about network traffic and can alert network administrators about adverse conditions that need attention?
SNMP
What layer of the OSI model describes how data between applications is synced and recovered if messages don't arrive intact at the receiving application?
Session Layer
What statement accurately reflects what occurs when a message is too large to transport on a network?
The message is divided into smaller messages called segments (for TCP) or datagrams (for UDP).
The fundamental difference between a switch and a router is that a switch belongs only to its local network and a router belongs to two or more local networks. T or F
True
The industry standard height for a rack in rack units is 42U. T or F
True
The process of designing, implementing, and maintaining an entire network is called the system life cycle. T or F
True
The term firmware refers to programs embedded into hardware devices. This software only changes when a firmware upgrade is performed. T or F
True
True or False: Fiber-optic cable is the most expensive transmission medium.
True
UDP port 123 is utilized by the Network Time Protocol service. T or F
True
When using IPv6, two or more nodes on the same link are said to be neighbors. T or F
True
Which type of cabling consists of one or more insulated wire pairs encased in a plastic sheath?
UTP (Unshielded twisted pair)
A dedicated telephone switch or virtual switching device that connects and manages calls within a private organization, and manages call connections that exit the network through a VoIP gateway, is known by what term?
VoIP PBX (private branch exchange)
A change coordinator functions as what type of manager?
project manager
You are connected to your network's Cisco router, and need to verify the route table. What command should you enter?
show ip route
In which method of communication do signals travel in both directions over a medium but in only one direction at a time?
simplex
If your network consists of all connected devices connecting to one central device, such as a switch, what type of topology is being used?
star topology
In which type of multiplexing does the transmitter assign slots to nodes according to priority and need?
statistical time division
Which term is used to describe the measure of how much data is actually transmitted during a given period of time?
throughput
Which traceroute command will perform a trace using ICMP echo requests instead of UDP datagrams to the host srv1.mycompany.com?
traceroute -I srv1.mycompany.com
What command can be used to check a domain computer's time source from a Command Prompt window?
w32tm /query /source
When viewing the pinout for T568B, what is the correct order of wire colors, starting at pin 1?
white/orange, orange, white/green, blue, white/blue, green, white/brown, brown
ARP tables might contain two different types of entries. What are they, and how are they created?
ARP tables contain dynamic and static entries. Dynamic ARP table entries are created when a client makes an ARP request for information that could not be satisfied by data already in the ARP table; once received, the new information is recorded in the table for future reference. Static ARP table entries are those that someone has entered manually using the ARP utility.
When creating network diagrams, what icon description typically represents a network router?
An icon that has a hockey-puck shape with two arrows pointing inward and two arrows pointing outward.
When creating network diagrams, what icon description typically represents a network switch?
An icon that is rectangular, which contains four arrows pointing in opposite directions.
When creating network diagrams, what icon description typically represents a network firewall?
An icon that resembles a brick wall
In the TCP/IP model, what layer combines the responsibilities of the Application, Presentation, and Session layers from the OSI model?
Application
In order to ensure that a cable is not affected by electromagnetic interference, how far away should the cable be from fluorescent lighting?
At least 3 feet
What is by far the most popular DNS server software available?
BIND
A hardware component that can be changed without disrupting operations is known as _____.
Hot swappable
Which Network layer protocol reports on the success or failure of data delivery?
ICMP
What is assigned to each node on a network, which is then used by the Network layer to uniquely identify the node?
IP address
What statement correctly describes "jitter"?
Jitter is what happens when packets experience varying amounts of delay and arrive out of order.
At what layer of the OSI model does a network switch normally operate?
Layer 2
At what layer of the OSI model does a network switch normally operate?
Layer 2, data link
HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model?
Layer 7
HTTP, IMAP4, FTP, and Telnet are all examples of protocols that operate at what layer of the OSI model?
Layer 7, Application layer
The frame header at the Data Link layer includes hardware addresses of the source and destination NICs. What is another name for this address?
MAC (Media Access Control) address
What are some of the basic functions of a network router?
Some of the basic functions a router can preform: filtering broadcast transmissions, preventing certain types of traffic from getting to a network, support simultaneous local and remote connectivity, provide high network fault tolerance through redudant componets such as power supplies, monitor network traffic, report statistics, diagnose internal or other connectivity problems and trigger alarms.
The IP connectionless protocol relies on what other protocol to guarantee delivery of data?
TCP
Describe how the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) differ from each other, and provide examples of where each might be used.
TCP makes a connection with the end host, checks whether the data is recieved, and resends it if it is not. TCP is used by application such as email or web browsers. UDP does not guarantee delivery. UDP is used for broadcasting, such as streaming video or audio.
You have been awarded a contract for wiring a new federal building. What twisted-pair wiring standard must you use?
TIA/EIA 568A
How is the TTL (Time to Live) field utilized in IPv4?
TTL is a value in an IP packet that tells a network router whether or not the packet has been in the network too long and should be discarded.
In considering the responsibilities of each layer of the OSI model, what statement accurately reflects those of the Presentation layer?
The Presentation layer is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read.
Which of the following is an example of encapsulation?
The addition of a header to data inherited from the layer above in the OSI model.
How can you determine the manufacturer of a NIC card based on the MAC address?
The first 24 bits, known as the Organizationally Unique Identifier, identify the manufacturer.
What part of a MAC address serves as the extension identifier, or device ID?
The last 24 bits of the MAC address.
What are the two different variations of network address translation (NAT)?
The two variations of network address translation is SNAT and DNAT.
The TCP and UDP protocols both exist at what layer of the OSI model?
Transport
A continuity tester should not be used on a live network segment. T or F
True
A master service agreement (MSA) is a contract that defines the terms of future contracts between parties, such as payment terms or arbitration arrangements. T or F
True
A wavelength mismatch occurs when transmissions are optimized for one type of cable but sent over a different type of cable. T or F
True
At the root level of the DNS hierarchical structure, 13 clusters of root servers hold information used to locate TLD servers. T or F
True
Each organization that provides host services on the public Internet is responsible for providing and maintaining DNS authoritative servers for public access. T or F
True
Fiber-optic cable comes in two types: single-mode fiber (SMF) or multimode fiber (MMF). T or F
True
IP is an unreliable, connectionless protocol, as it does not establish a session to send its packets. T or F
True
In general, an API (application programming interface) call is the method an application uses when it makes a request of the OS. T or F
True
The Border Gateway Protocol is considered to be a hybrid routing protocol. T or F
True
The TIA/EIA standard for wall jacks in a work area require that at least one outlet be provided for data and one for voice. T or F
True
The cost of upgrading infrastructure has been a major factor in the slow adoption of IPv6. T or F
True
The difference between continuity testers and performance testers lies in their sophistication and price. T or F
True
At which layer of the OSI model is a packet encapsulated with its own header and trailer to create a frame?
Which statement regarding the Border Gateway Protocol (BGP) is accurate?
What are the three different types of port number ranges as defined by IANA?
You first have the well known ports ranging from 0 to 1023. Then you have the registered ports ranging from 1024 to 49151. Lastly you have the dynamic and private ports ranging from 49152 to 65535.
ARP relies on _____, which transmits simultaneously to all nodes on a particular network segment.
broadcasting
What component of enterprise level structured cabling serves as the location where an incoming network interface enters a building and connects with the building's backbone cabling?
entrance facility
A policy in which all exit doors for a building stay unlocked during a fire is an example of what type of policy?
fail-open
The Data Link Layer utilizes what name for its protocol data unit (PDU)?
frame
On a Linux-based system, what command can be used to display TCP/IP information associated with every interface on the system?
ifconfig -a
Where is a demarc located in relation to the structured cabling of an enterprise environment?
in the main distribution frame (MDF)
What command can you utilize to display TCP/IP configuration information for each network adapter installed?
ipconfig /all
A Windows computer on your network is having issues resolving queries for a specific domain, but not other domains. Other computers on the same network resolve the name just fine. What command can you issue that might fix the problem?
ipconfig /flushdns
Routing protocols that enable routers to communicate beyond neighboring routers, allowing each router to independently map the network, are known as which type of protocols?
link-state protocols
With a FQDN of ftp1.dallas.mycompany.com, what part is the domain name?
mycompany.com
Which command will produce statistics about each message transmitted by a host, separated according to protocol type?
netstat -s
At the Transport layer of the OSI, what is used to find and communicate with a particular application running on a host?
port numbers