AF Officer Cyber Networking Course
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Created by:
Skywalker28 on April 4, 2011
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113 terms
Terms | Definitions |
|---|---|
 Name 3 benefits of networking communications systems. | - The sharing of information; Information availability; The ability to access information from a distance |
| What provides: long haul data, voice, video, transport networks, services and is referred to as the backbone of the Global Information Grid? | Defense Information System Network (DISN) |
| What resides on a Motherboard? | Processors; Memory; Buses; Basic Input/Output System (BIOS) |
| What computer bus allows hot-swappable peripheral connections? | Universal Serial Bus (USB) |
| What type of computer memory has the goal to reduce data access times? | Cache Memory |
| What RAID level only increases access speed and does not provide redundancy? | RAID level 0 |
| What is the conceptual model that describes how information from on computer system moves across a network to another computer system? | Open Systems Interconnection Model (OSI) |
| What are the seven layers of the OSI model? | 7. Application; 6. Presentation; 5. Session; 4. Transport; 3. Network; 2. Data Link; 1. Physical |
| What are the two sections the seven layers can be divided into? | Layers 1-4, handle data transport issues; layers 5-7, handles application specific issues |
| What OSI layer is responsible for end-to-end connections? | Layer 4 "Transport Layer" |
| What OSI layer uses logical (IP) addressing and makes best path determinations? | Layer 3 "Network Layer" |
| What OSI layer uses Media Access Control (MAC) addresses and combines packets into frames? | Layer 2 "Data Link Layer" |
| What OSI layer actually puts the binary on the transmission media? | Layer 1 "Physical Layer" |
| List the three layers of the Cisco Hierarchical model, and briefly describe each. | Core Layer: Responsible for transporting large amounts of traffic both reliability & quickly; Distribution Layer: Provides routing, filtering, and WAN access and to determine how packets can access the core, if needed; Access Layer: Controls user & work-group access to internet work resources |
| When a router or a switch first boots up, what operation takes places first? | It runs the POST :Power-On-Self-Test" |
| What metrics does EIGRP use to select the best possible path, and what is the default metric? | Bandwidth |
| What switch or router command would display the information in the running configuration file? | Show running-config |
| Router WAN connections are usually associated with what type of connection/transmission? | Serial |
| What is the type of encapsulation needs to be considered/selected when preparing a router WAN connection? | Cisco only supports HDLC, PPP, and Frame Relay on it's serial interfaces [Need to consider Point-to-Point encapsulation] |
| If you want to configure PPP authentication on a Cisco router WAN connection, what configuration steps must be set? | First, the host name of the router must be set, then the username and password for the remote router that will be connecting to your router must be set. (HDLC & PPP) |
| What is the Cisco default WAN encapsulation? | HDLC "High Level Data Link Control" |
| What non-proprietary WAN encapsulation supports authentication? | PPP "Point to Point" - Non-Proprietary; Allows Authentication |
| What OSI layer uses data encryption, compression and transmission services to define data representation? | Layer 6 "Presentation Layer" |
| What device connects multiple Ethernet segments together so they act like a single segment (one collision domain)? | A hub |
| What device maintains MAC address tables and uses these physical addresses to transmit data across a network? | A switch |
| Switches speed up LAN by implementing full-duplex operations. Can a switch connect to a hub using full duplex? | No |
| What are the three types of RJ-45 connector cables we've talked about, and what connections do they make in our LAN? | Straight through > Connects unlike devices; Cross-Over > Connects like devices; Roll Over > used to console into a switch/router |
| What device works at the network layer to forward data using logical (IP) addresses? | A router |
| In a Cisco device, what command lets you advance from user mode to privileged mode? | Enable |
| From user mode (>), what command string would allow you to set a router's hostname to Keesler? | -Router> ena -Router# config t -Router(config)# Hostname Keesler |
| When setting a message of the day (MOTD) banner, what must precede and follow the MOTD statement that you want displayed? | A delimiting character, this tells the router you're done, such as # Stay off the Router # |
| In router lab environment often there are no DCE devices, so when two routers are connected via serial connection, one router acts as a DCE device while the other router remains a DTE device. What special commands are applied to the DCE serial interface? | -Router>ena -Router# config t -Router(config)# int s0/0 -Router(config-int) bandwidth 64 -Router(config-int) clock rate 64000 |
| What does the Cisco Discovery Protocol command: CDP timer 90 do? | Sets the rate in seconds, at this CDP packets are sent |
| What CISCO switch commands are required enable inter-VLAN trunking on interface FA0/23? | -Router>ena -Router# config t -Router(config)# int fa0/0 -Router(config-int) switchport mode trunk |
| What Cisco proprietary routing protocol is classless and will support VLSM networks? | EIGRP |
| What router configuration technique supports inter-VLAN routing by allowing multiple IP address to be assigned to a single physical address? | Sub-interfacing |
| What routing option ensures that routing information is not advertised out the same port it was received? | Split Horizon |
| What router options implements a list of conditions that will categorize and control network traffic? | Access Lists |
| Give an example of a standard access list that would only permit 172.30.100.34 access to deny all other network traffic. | Access-list 10 permit 172.30.100.34 |
| What are the three layer-2 switch functions? | Address learning; Loop avoidance; Making forward & filter decisions |
| Redundant switching topologies increase reliability, but what three problems can these topologies cause? | Broadcast Storm; Multiple Frame Copies; MAC Address Table Instability |
| What switching protocol prevents network switching loops? | Spanning Tree Protocol "STP" |
| With security concerns being paramount, what should you configure first in a CISCO device? | A password for user & privileged mode |
| Being able identify the CISCO device is important, so after you configure passwords, you should now name the device using what command? | Router(config)# hostname Hickam |
| To make global changes to your router's configuration, what command must be entered from the privileged mode prompt? | config t |
| What switch command would be necessary to allow remote management through an application such as telenet? | Setting the IP info (int vlan 1 - IP address & default gateway) |
| What are the LAN switch mode/types and how much of the received from do they check before forwarding? | Cut through > Reads the destination MAC & immediately forwards; Fragment Free > Reads into the data section to ensure fragmentation did not occur; Store & Forward > Runs on complete CRC on every frame |
| What is the term that describes: When all ports on a switch have transitioned to either the forwarding or blocking modes/states? | Convergence |
| What kind of firewall is Sidewinder? | A Proxy Firewall - that uses a combination of type enforcement, proxies, servers, and access control rules to control traffic, and provides services to network users, and hides protected address space. |
| When configuring Sidewinder, why is Secure Shell preferred over telnet? | Secure Shell encrypts the username & password of a package, telnet does not because it transmits in clear text. |
| What protocol is designed to enable network administrators to manage performance, solve problems and plan for growth? | Simple Network Management Protocol (SNMP) enables |
| What protocol allows managed devices to collect and store information and forward the data to Network Management Systems? | Simple Network Management Protocol (SNMP) allows |
| What standard specification enables network monitors and console systems to exchange network monitoring data? | Remote Monitoring (RMON) |
| You find evidence that an intruder has accessed your router via telent what should you do to prevent future access, while not impeding traffic through your busy network? | Create or modify your access-list |
| What type of access list would be best to implement if a worker needed to be denied access into the accounting LAN or if you needed to deny entire TCP or UDP protocol like all ICMP traffic? | IP extended access list |
| What does CITS use as its standard trouble ticketing software? | Remedy (Ticketing Software) |
| What technology does HP Openview use to ease configuration and display the network in a grphical manner? | Graphic User Interface "GUI" |
| HP Openview addresses which specific levels of FCAPS? | Fault Management; Configuration; Performance |
| What command would be the best test to check if a computer can send and receive data? | PING |
| Which command would you use from a command prompt to view the MAC address of a computer? | IP Config /all |
| What program running within a Windows domain controller will assign network devices dynamic IP addresses? | DHCP |
| What type of devices are commonly configured to be DHCP clients? | Windows clients and servers who don't require static addresses |
| What allows you to issue more IP addresses than you have available in your subnet? | Superscopes |
| For your DHCP server to be valid in your network, the server must be ________ by the active directory service. | Authorized |
| What DHCP configuration option allows to always get the same dynamic IP address | DHCP reservations |
| The range of allowed DHCP addresses on a server can distribute is otherwise refered to as a DHCP ________. | Scope |
| What are the two primary goals of network management systems? | Provide reliable consistent service; Reduce cost |
| The CORE layer of the CITS model designed to provide a ________. | High Speed Switching back bone |
| Using class-full ideology and given IP address 172.20.101.67 and using which part is network and which part is host? | Class B) 128-191 N,N,H,H |
| Using class-full ideology and given IP address 125.2.10.7 and using which part is network and which part is host? | Class A) 1-127 N,N,N,H |
| Using class-full ideology and given IP address 193.15.1.88 and using which part is network and which part is host? | Class C) 192-223 N,N,N,H |
| How many subnets are possible with a Class C address which a subnet mask 255.255.255.252 | 62, borrowing 6 bits |
| How many hosts are possible with a Class C address with a subnet mask 255.255.255.252? | 2² = 4-2 = 2 -or- 8-6 bits = 2 |
| How many subnets are possible with a Class B address with a subnet mask 255.255.248.0? | 2⁵=32-2 = 30 |
| How many hosts are possible with a Class B address with a subnet mask 255.255.255.255? | 2 |
| What is the class of the following IP addresses? 172.50.30.1; 195.60.21.3; 20.6.1.1 | Class B; Class C; Class A |
| Given IP address 191.243.36.43 and the subnet mask 255.255.255.224, what is the subnet? | N,N,H,H; 191.243.36.32; 43 falls between 32-64 |
| Given IP address 171.23.30.43 and the subnet mask 255.255.248.0, what is the subnet address? | N,N,H,H; 171.23.24.0 |
| Given IP address 91.27.57.43 and the subnet mask 255.252.0.0, what is the subnet address? | N,H,H,H; 91.24.0.0 |
| What services do local communications systems commonly include? | SIPRNET, NIPR, telephone networks, LANs, email, Video telecon |
| What does TELNET allow a user to do? | Allows a user on a remote client machine, called telnet client, to access the resources of another machine, the TELNET services. |
| What is the name of the contention media that allow all hosts on a network to share the same bandwidth? | Ethernet |
| What cable would you use to connect a switch to a switch? | Crossover Cable |
| The ______Layer uses switching to control user and workgroup access to internet work resources. | Access |
| If a router boots up with no startup configuration in NVRAM, what mode does the router enter? | Setup mode |
| What can be used to display a security notice to people logging into your Cisco device? | MOTD (Message of the Day) banner |
| What command would set your device's encrypted password to J3^^y, and what mode does this password protect? | Router# enable secret J3^^y; Privileged/enable mode |
| When showing an interface, is it possible for the line to be down and the protocol to be up? | No, the condition is not possible |
| How does spanning tree protocol keep track of switches? | Bridge ID |
| What are the three VLAN trunking protocol (VTP) modes? | Client; Transparent; Server |
| Where is trunking enabled (command: switchport mode trunk) when setting up inter-VLAN routing? | Trunking that connects to the port of Layer 2 switch (Client) |
| What are the three ways to gain management access to a router? | Console; Telnet; Auxiliary Port |
| In order, what are the four STP port states? | Blocking, listening, learning, forwarding |
| What digital service is designed to run over existing phone lines? | ISDN "Integrated Services Digital Network" |
| What command would you use to set a router interface to the clock rate of 64Kbps? | Clock rate 64000 |
| When developing an access list, how should you order your entries? | Place most specific test entries @ the beginning & broad test entries toward the end. |
| What is IP spoofing? | When hackers mask thier IP address, using a legit address from your network |
| What management software enables automation and management of internal and external service and support processes? | Remedy (Management; Service and Support Processes) |
| How does HPOV test connectivity? | PING, Status Poll, SNMP Walk, Trace Route, Poll Node & Capacity Poll |
| What tool helps diagnose network problems by allowing you to track the number of hops necessary for a packet to get to its destination? | Trace Route |
| What defines a collection of one or more domains that share a common schema and global catalog? | Forrest |
| Why do we define sites in active directory? | To control replication traffic, make authentication tasker, locate the nearest server providing directory-enabled services. |
| What do you consult before installing software on hardware? | Hardware compatibility list |
| What can be used to stipulate how long users can use a computer after they log on? | Initial agreement to service agreement |
| What ensures every active duty and reserve base has an infrastructure to link future voice, data, video, imagery, and sensory systems via high capacity transport media? | Information Transport System (ITS) |
| When configuring a Cisco device, what are 3 different type of passwords used to control access? | Enable Secret Password, Console Password & Virtual terminal password |
| When initially configuring a router, what cable would you choose to connect a switch or router from your computer's serial port? | Roll Over Cable |
| How can you access a switch for configuration? | Console Port & Telnet |
| Frame Relay, Point-to-Point Protocol (PPP), High-Level Data-Link Control (HDLC) are what kind of protocols? | WAN - Configured on a serial port |
| What are the 4 SNMP communication commands? | Read, write, trap & transversal operations |
| What SNMP communication reports managed device events to a Network Management System (NMS)? | Trap |
| What security device prevents unauthorized users from gaining network access or from monitoring data transfers? | Firewall |
| What server application resolves name to IP addresses? | DNS |
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