Supporting IPv4 and IPv6 Networks Flashcards
1
Q
DHCP
A
Dynamic Host Configuraton Protocol
2
Q
netsh
A
- Command to configure network adapter interfaces
- netsh interface IP set address “ethernet” dhcp
- net interface IP set address “ethernet” static 10.1.0.1 (IP address) 255.255.255.0(subnet mask) 10.1.0.254(default gateway)
- All changes made are persistent(stick around through reboots)
3
Q
ipconfig/all
A
- displays complete TCP/IP configuration paraments for each interface
- included whether DCHP is enabled and the MAC address
4
Q
inconfig /renew “interface”
A
- Forces DHCP client to renew lease for IP address
5
Q
inconfig /release “interface”
A
- Releases IP address obtained by DHCP server so that interfaces no longer have IP address
6
Q
ipconfig /displaydns
A
- displays DNS resolver cache
7
Q
ipconfig /flushdns
A
- Clears DNS resolver cache
8
Q
ipconfig /registerdns
A
- Registers host with DNS server (if it supports dynamic updates)
9
Q
ARP
A
Address Resolution Protocol
- used by hosts to determine which MAC address goes to which IP address on local network
- Cached in ARP table
10
Q
ARP Utility
A
- Used to perform functions related to ARP table cache
- Used to diagnose suspected problems with local addressing and packet delivery
11
Q
arp -a
A
- Shows ARP cache contents
- use with “IPAddress” to view ARP cache for specific interface only
- There will be no cache entry for hosts that have not had a recent exchange of frames
12
Q
arp -s IPAdress MACAddress
A
- Adds an entry to the ARP cache.
13
Q
arp -d *
A
- Deletes all entries in ARP cache
- Can also be used with IPAddress to delete single entry
14
Q
ICMP
A
Internet Control Message Protocol
- Used to report errors and send messages about the delivery of a packet
- Generated under error conditions in most unicast traffic
- Can also be used to test connectivity on IP networks
15
Q
Ping
A
- Sends a configurable number and size of ICMP request packets to destination host
- Milliseconds on reply measure Round Trip Time and can be used to diagnose latency problems
- 4 or -6 looks for Ipv4 or v6
- -t starts continuous ping
16
Q
UPS
A
Uninterruptable power supplies
17
Q
Ping Sequence for connectivity issues
A
- Ping loopback address to verify TCP/IP
- Ping IP of local host to verify network adapter
- Ping default gateway to verify it is up and running and you can communicate with other host on network
- Ping other local hosts to verify local links and configuration
- Ping remote host to verify communication through router
18
Q
Canonical notation
A
- Means of compressing IPv6 addresses
- A double byte with leading 0s can be ignored
- One continuous series of 0s can be replaced with double colon place marker
- Double colon compression can only be used once in a given address
19
Q
netsh interface ip show config
A
- reports ip configuration
20
Q
get-netadapter/get-netIPaddress
A
- Powershell cmdlets to query interface configuration
21
Q
netipaddress
A
- Powershell cmdlet to set new configuration
22
Q
set-netipaddress
A
- Powershell cmdlet to modify existing interface configuration
23
Q
ipconfig
A
- displays: IP address Subnet Mask default gateway - for all network interfaces to which TCP/IP is bound
24
Q
ip neigh
A
- Linux command to show entries in local ARP cache
25
Q
Duplicate IP
A
- can be caused by configuration error
- Both hosts will contend to receive traffic
- To solve, obtain MAC addresses of both interfaces using ping and arp-a(or arping in linux)
- Then configure each host for unique addresses
26
Q
Duplicate MAC
A
- Both hosts will contend to respond to ARP queries
- Could be sign of spoofing attempt
- Use arp utility to verify MACs and ipconfig or IP neigh to check MAC assigned to interface
27
Q
Multicast Flooding
A
- At layer 2, if switch is not multicast aware, it will treat it as broadcast and flood across all ports
- Consumes bandwidth
- IGMP snooping can be enabled which determines if hosts on a VLAN have joined a multicast group
- Multicast traffic would then be filtered from those ports and VLANS
