CH7 - Course Quiz Flashcards
A Router determines where an incoming packet should go by looking at the Packet’s ________?
source IP Address
source MAC Address
destination IP Address
destination MAC Address
destination IP Address
Which form of NAT typically handles the one-to-many connections?
Source NAT
Static NAT
Destination NAT
Port Address Translation (PAT)
Port Address Translation (PAT)
Which is used to designate a specific local address for various Network Services?
port fowarding
static routing
overloaded NAT
source NAT
port forwarding
Which is used to determine the largest frame a particular technology can handle?
hop count
traceroute cost
maximum transmission unit
latency link state
Maximum Transmission Unit (MTU)
When a Router has more than one Route to the same Network, the responsibility for assigning a different metric for each Route lies with the ________?
manufacturer of the Router
Internet Assigned Numbers Authority (IANA)
operating system, which must dynamically reconfigure the Route
person in charge of that Router
person in charge of that Router
Which term refers to the ability of one connection to handle more data than others?
cost
bandwidth
latency
transmission
bandwidth
Which type of NAT allows many computers to share a Pool of Routable IP addresses that number fewer than the computers?
source NAT
static NAT
dynamic NAT
destination NAT
dynamic NAT (Network Address Translation)
What is the name of CISCO’s proprietary OS?
EIGRP
NAT
Cisco IOS
MAC IOS
Cisco IOS
Which protocol is used on the Internet for communication between Autonomous Systems?
Open Shortest Path First (OSPF)
Overloaded NAT
RIPv2
Border Gateway Protocol (BGP-4)
Border Gateway Protocol (BGP-4)
Which attribute applies to the OSPF Routing method?
It corrects link failures and creates convergence almost immediately.
It uses the CISCO IOS opearating system for communication.
It sends Routing information at regular intervals even if there are no changes.
It has a max hop count of 15.
It corrects link failures and creates covergence almost immediately.
Routers work with the Source IP Address of each Packet?
True
False
False
In a Router, there is one-to-one correlation of Routes to Ports?
True
False
False
What is the name of the classic CISCO Console cable, more commonly called a Rollover Cable?
Yost
Parallel
Port
Crossover
Yost
Which Protocol is CISCO’s proprietary Protocol?
EIGRP
OSPF
IS-IS
BGP
EIGRP (Enhanced Interior Gateway Protocol)
The Protocol used by Autonomous Systems to communicate with each other is _____________?
Mixed Gateway Protocol (MGP)
Exterior Gateway Protocol (EGP)
Interior Gateway Protocol (IGP)
Cross Gateway Protocol (CGP)
Exterior Gateway Protocol (EGP)
List the five steps of Basic Router Configuration?
- Setup the WAN Side - Know the Network ID’s for each side of your Router
- Setup the LAN Side - Choose a Network ID
- Establish Routes - Routers are smart and use the information you provide it to build a Routing Table automatically.
- Configure Dynamic Routing Protocol (OPTIONAL)
- Document and Save Configuration
Describe Dynamic NAT (DNAT)?
Also known as “Pooled NAT” (Network Address Translation)
DNAT (Dynamic NAT) has a limited Pool of Internet Addresses to give to a number of internal devices.
Explain EIGRP?
EIGRP = Enhanced Interior Gateway Routing Protocol
It’s a Dynamic Routing Protocol that uses Advanced Distance-Vector Routing for Automatic Routing decisions and configuration.
Protocol was designed by CISCO and is only available on CISCO Routers.
What is the basic idea behind the concept of a Link State Dynamic Routing Protocol?
Basically it’s more efficient because it sends out the entire Routing Table at regular intervals.
Why does BGP implement Route aggregation?
To minimize the size of the Routing Table.
Classically, Routers are dedicated boxes that contain at least _________ connections, although many Routers contain many more connections?
two
The cornerstone of all Distance Vector Routing Protocols is the ___________?
metric
_________ is an advanced tool used to describe, vistualize, and configure an entire Network?
Network Management Software (NMS)
A ___________ is a relative value that defines the desirability of a Route?
metric
___________ Routers invariably have Network Address Translation (NAT) turned ON by default?
Home
If a Routing Table has two or more valid Routes for a particular IP Address destination, it always chooses the Route with the highest metric?
True
False
False
Which Routing Table gateway value indicates that there is no gateway needed for a Network ID?
- 1.1.1
- 33457
- 255.255.255
- 0.0.0
0.0.0.0
Which column in a ROuting Table tells the Router which of its Ports to use?
Type and Iface
Network Destination
Metric, Ref, and Use
Genmask
Type and Iface
Explanation: Destination = Defined Network ID Gateway = IP Address for the Next Hop Router Genmask = Subnet Mask Flags = Describes the Destination Metric, Ref, and Use = Routing Metrics Type and Iface = Port/Type of Port
With distance vector Routing Protocols, the simplest total cost sums the hops (the hop count) between a Router and a Network?
True
False
True
What is the max number of hops allowed by RIP?
12
8
15
4
15
Which vector Routing Protocol is considered the granddaddy of all distance vector Routing Protocols?
OSPF
EIGRP
RIP
BGP
RIP (Routing Information Protocol)
At which Layer of the OSI Model do Routers work?
Session
Network
Transport
Data Link
Network
What tasks should be performed as soon as an Admin finishes configuring a Router?
Run the operating system’s traceroute tool and document how you configured the Router
Turn on the Network Management Software (NMS) and turn on Dynamic Routnig
Turn on Dynamic Routing and run the operating system’s traceroute tool
Document how you configured the Router and backup the Router config
Document how you configured the Router and backup the Router config
Explanation:
Router Setup Steps
1. Setup the WAN Side - Know the Network ID’s for each side of your Router
2. Setup the LAN Side - Choose a Network ID
3. Establish Routes - Routers are smart and use the information you provide it to build a Routing Table automatically.
4. Configure Dynamic Routing Protocol (OPTIONAL)
5. Document and Save Configuration
Which Protocol is a Link State Dynamic Routing Protocol?
RIPv2
BGP
RIPv1
IS-IS
IS-IS (Intermediate System to Intermediate System)
Explanation:
OSPF (Open Short Path First) is Link State IGP (Interior Gateway Protocol) Dynamic
RIPv1 and RIPv2 are IGP, but not Link State, they are Distance Vector Dynamic
BGP (Bridge Gateway Protocol) is EGP (Exterior Gateway Protocol) but not Link State
IS-IS is Link State and an Alternate to OSPF so IS-IS is the best answer with the options given.
Secure Shell (SSH) is a terminal emulation protocol that uses the Network instead of a serial cable to connect?
True
False
True
_______ maps a single routable (that is, not private) IP Address to a single machine, enabling you to access that machine from outside the Network?
Dynamic NAT
Source NAT
Destination NAT
Static NAT
Static NAT (Network Address Translation)
The Network or Networks within an AS communicate with Protocols called?
Exterior Gateway Protocols (EGP)
Cross Gateway Protocols (CGP)
Interior Gateway Protocols (IGP)
Mixed Gateway Protocols (MGP)
Interior Gateway Protocols (IGP)
Explanation:
The key word is “Within”.
AS = Autonomous Systems
The AS are the Big Networks that make up the Internet = Exterior Gateway Protocols (EGP)
And the Networks “Within” an AS are known as Interior Gateway Protocols.
Describe the two situations in which a Routing Table would not have Default Routes?
Isolated (As in NOT on the Internet), inter-networks, where every Router knows about every single Network,
and the monstrous “Tier One” backbone, where you’ll find the Routers that make the main connections of the Internet.
Describe an Autonomous System?
Autonomous Systems are the big Networks that make up the Internet
More specifically, an Autonomous System (AS) is a Large Network or Group of Networks that has a unified Routing Policy.
In general terms, explain what happens when a Router connection goes down on the Internet?
Routers with multiple Routes constantly talk to each other, detecting when a connection goes down and will automatically switch to alternate Routes.
Briefly describe the functions of a Home Router?
Often combines a Router, a Switch, and a WAP in one.
Usually has other features like Firewall, a DHCP Server, and much more in a single box.
What is the purpose of the Border Gateway Protocol (BGP)?
It’s the glue of the Internet, connecting ALL of the Autonomous Systems.
You connect to and configure many modern Routers using software programs callled _______ that enable your PC to pretend to be a dumb terminal?
Terminal Emulators
The de factor standard for ISPs is _________, a Link State dynamic Routing Protocol?
Intermediate System to Intermediate System (IS-IS)
Every Router comes with a __________ that tells the Router exactly where to send the Packets?
Routing Table
Which Routing Protocol does NOT support variable-length Subnet Masking (VLSM)?
IS-IS
RIPv1
OSPF
RIPv2
RIPv1 (Routing Information Protocol)
Which Protocol is Path Vector Routing Protocol?
OSPF
EIGRP
RIP
BGP
BGP (Bridge Gateway Protocol)
Which Routing Protocol is the choice in most large enterprise’s internal Networks?
EIGRP
BGP
IS-IS
OSPF
OSPF (Open Short Path First)
Which tool is used by an Admin to manage many Routers and provide an overall view of all the Network?
traceroute
Network Management Software (NMS)
MTR
ping
Network Management Software (NMS)
What Protocol was adopted in 1994 and is now considered obsolete except for small, private WANs?
Border Gateway Protocol (BGP-4)
RIPv2
Open Shortest Path First (OSPF)
Overloaded NAT
RIPv2 (Routing Information Protocol)
Describe Intermediate System to Intermediate System (IS-IS)?
It’s a Interior Gateway Protocol (IGP), Link State alternate to OSPF (Open Shortest Path First)
Designed to move data efficiently within a Network and accomplishes this by determining the best route for Data through a Packet switching Network.
How does CISCO describe Ethernet NICs in its device software?
gig0/0
Describe Open Shortest Path First (OSPF)?
It’s an Interior Gateway Protocol (IGP), Link State that needs to be configured on the Router for it to work, but once configured a Link gets established where convergence begin with Routers sharing AreaID and Routing information quickly.
Compare the MY Traceroute (mtr) command to the traceroute command?
Traceroute produces the output in order from Top, Down.
MTR is dynamic, meaning it renders output as soon as it is available, and it can go back to be updated on previous lines.
What is the basic idea behind the concept of a Link State Dynamic Routing Protocol?
Link State/Dynamic Routing is more modern.
Many improvements over Distance Vector Routing, where that was measured by Hop Counts and had limitations.
Link State is Routers communicating with other Routers to share Routing Information/Routing Tables to help speed up communication.
OSPF’s metric is cost, which is a function of __________?
bandwidth
Routers running some form of __________ hide the IP Address of computers on the LAN side but still enable those computers to communicate with the broader Internet?
NAT (Network Address Translation)
_____________ Routing Protocols calculate the metric number to get to a particular NetworkID and compare that metric to the metrics of other Routes to get to the same Network ID?
Distance Vector
When a Router takes routes it has learned by one method, say RIP, or a statically set route, and announces those routes over another Protocol such as OSPF, this is called _______________?
route redistribution
