Chapter 1 Flashcards
What are the three varieties of remote access locations?
- Home Offices
- Mobile Users
- Branch offices
What is a function of the firewall?
To monitor and control the incoming and outgoing network traffic.
Which network charasteristic indicates the general expense for the purchasing of network components and installation and maintenance?
Cost
List the OSI-modell
- Application
- Presentation
- Session
- Transport
- Network
- Data Link
- Physical
List the TCP/IP Stack
- Application
- Transport
- Internet
- Link
What are the two EXEC access levels
user EXEC
Privileged EXEC
What happens at first when a switch is powered on.
POST begins
Power On Self Test
What is the length of the source address in the IPv4 header?
4 bytes
What are the private IPv4 addresses?
- 0.0.0 - 10.255.255.255
- 16.0.0 - 172.31.255.255
- 168.0.0 - 192.168. 255.255
What does VLSM stand for?
Variable-length subnet mask
What is a major difference between TCP and UDP
TCP can ensure that the data is delivered, UDP does not.
What are three common applications that use TCP?
Web Browsers
Email
FTP
What are three common applications that use UDP?
TFTP
Streaming Video
VoIP
What does the letter D that is associated with the routing table entry present?
The route is learned by EIGRP, the administrative distance is 110.
What is the administrative distance for OSPF
110
The show ip interface brief can be used to:
Display IP-adresses, interface status and other brief details about interfaces
How do you enable LLDP globally?
lldp run
How do you enable LLDP on an interface?
lldp transmit
lldp receive
What are the number range for standard ACL
1-99, 1300-1999
What are the number range for extended ACLs
100-199, 2000-2699
Describe the different NAT types:
Static NAT
Dynamic NAT
PAT
Static NAT = One to One
Dynamic NAT = many to many
PAT (overload) = Many to One
Static NAT configure example:
router(config)# interface gi0/1
router(config-if)# ip address 209.165.201.1
router(config-if)# ip address ip nat outside
router(config)# interface gi0/0
router(config-if)# ip address 10.1.1.1 255.255.255.0
router(config-if)# ip nat inside
router (config)# ip nat inside source static 10.1.1.2 209.165.201.1
NAT show commands?
show ip nat translations - shows which inside address are being translated to a public.
show ip nat statistics
Dynamic NAT configure example:
router(config)# access-list 1 permit 10.1.1.0 0.0.0.255
router(config)# ip nat pool NAT-POOL 209.165.201.5 209.165.201.10 netmask 255.255.255.240
router(config)# interface gi0/1
router(config-if)# ip address 209.165.201.1
router(config-if)# ip address ip nat outside
router(config)# interface gi0/0
router(config-if)# ip address 10.1.1.1 255.255.255.0
router(config-if)# ip nat inside
router(config)#ip nat inside source list 1 pool NAT-POOL
Viktig skillnad, den matchar alltså en ip adress från access-list 1 (inside) till första möjliga i NAT-POOL.
